diff --git a/activitysim/abm/models/non_mandatory_tour_frequency.py b/activitysim/abm/models/non_mandatory_tour_frequency.py
index f54d5b120..53b1bbaed 100644
--- a/activitysim/abm/models/non_mandatory_tour_frequency.py
+++ b/activitysim/abm/models/non_mandatory_tour_frequency.py
@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import logging
+import warnings
 from pathlib import Path
 from typing import Any
 
@@ -200,12 +201,24 @@ def non_mandatory_tour_frequency(
             model_settings_file_name,
         )
 
-    # FIXME kind of tacky both that we know to add this here and del it below
-    # 'tot_tours' is used in model_spec expressions
     alternatives = simulate.read_model_alts(
         state, "non_mandatory_tour_frequency_alternatives.csv", set_index=None
     )
-    alternatives["tot_tours"] = alternatives.sum(axis=1)
+    if "tot_tours" not in alternatives.columns:
+        # add a column for total tours
+        alternatives["tot_tours"] = alternatives.sum(axis=1)
+        warnings.warn(
+            "The 'tot_tours' column may not be automatically added in the future.",
+            FutureWarning,
+        )
+    else:
+        # tot_tours already exists, check if it is consistent with legacy behavior
+        if not (alternatives["tot_tours"] == alternatives.sum(axis=1)).all():
+            warnings.warn(
+                "The 'tot_tours' column in non_mandatory_tour_frequency_alternatives.csv "
+                "does not match the sum of the other columns.",
+                RuntimeWarning,
+            )
 
     # filter based on results of CDAP
     choosers = persons_merged
diff --git a/activitysim/abm/models/util/canonical_ids.py b/activitysim/abm/models/util/canonical_ids.py
index 0ca1a1d3b..782828ca6 100644
--- a/activitysim/abm/models/util/canonical_ids.py
+++ b/activitysim/abm/models/util/canonical_ids.py
@@ -182,7 +182,7 @@ def determine_flavors_from_alts_file(
         flavors = {
             c: int(alts[c].max() + max_extension)
             for c in alts.columns
-            if all(alts[c].astype(str).str.isnumeric())
+            if all(alts[c].astype(str).str.isnumeric()) and (c != "tot_tours")
         }
         valid_flavors = all(
             [(isinstance(flavor, str) & (num >= 0)) for flavor, num in flavors.items()]
diff --git a/activitysim/examples/placeholder_psrc/configs/non_mandatory_tour_frequency_alternatives.csv b/activitysim/examples/placeholder_psrc/configs/non_mandatory_tour_frequency_alternatives.csv
index b9765aa75..09e89fae3 100755
--- a/activitysim/examples/placeholder_psrc/configs/non_mandatory_tour_frequency_alternatives.csv
+++ b/activitysim/examples/placeholder_psrc/configs/non_mandatory_tour_frequency_alternatives.csv
@@ -1,97 +1,97 @@
-escort,shopping,othmaint,othdiscr,eatout,social
-0,0,0,0,0,0
-0,0,0,1,0,0
-0,0,0,0,0,1
-0,0,0,1,0,1
-0,0,0,0,1,0
-0,0,0,1,1,0
-0,0,0,0,1,1
-0,0,0,1,1,1
-0,0,1,0,0,0
-0,0,1,1,0,0
-0,0,1,0,0,1
-0,0,1,1,0,1
-0,0,1,0,1,0
-0,0,1,1,1,0
-0,0,1,0,1,1
-0,0,1,1,1,1
-0,1,0,0,0,0
-0,1,0,1,0,0
-0,1,0,0,0,1
-0,1,0,1,0,1
-0,1,0,0,1,0
-0,1,0,1,1,0
-0,1,0,0,1,1
-0,1,0,1,1,1
-0,1,1,0,0,0
-0,1,1,1,0,0
-0,1,1,0,0,1
-0,1,1,1,0,1
-0,1,1,0,1,0
-0,1,1,1,1,0
-0,1,1,0,1,1
-0,1,1,1,1,1
-1,0,0,0,0,0
-1,0,0,1,0,0
-1,0,0,0,0,1
-1,0,0,1,0,1
-1,0,0,0,1,0
-1,0,0,1,1,0
-1,0,0,0,1,1
-1,0,0,1,1,1
-1,0,1,0,0,0
-1,0,1,1,0,0
-1,0,1,0,0,1
-1,0,1,1,0,1
-1,0,1,0,1,0
-1,0,1,1,1,0
-1,0,1,0,1,1
-1,0,1,1,1,1
-1,1,0,0,0,0
-1,1,0,1,0,0
-1,1,0,0,0,1
-1,1,0,1,0,1
-1,1,0,0,1,0
-1,1,0,1,1,0
-1,1,0,0,1,1
-1,1,0,1,1,1
-1,1,1,0,0,0
-1,1,1,1,0,0
-1,1,1,0,0,1
-1,1,1,1,0,1
-1,1,1,0,1,0
-1,1,1,1,1,0
-1,1,1,0,1,1
-1,1,1,1,1,1
-2,0,0,0,0,0
-2,0,0,1,0,0
-2,0,0,0,0,1
-2,0,0,1,0,1
-2,0,0,0,1,0
-2,0,0,1,1,0
-2,0,0,0,1,1
-2,0,0,1,1,1
-2,0,1,0,0,0
-2,0,1,1,0,0
-2,0,1,0,0,1
-2,0,1,1,0,1
-2,0,1,0,1,0
-2,0,1,1,1,0
-2,0,1,0,1,1
-2,0,1,1,1,1
-2,1,0,0,0,0
-2,1,0,1,0,0
-2,1,0,0,0,1
-2,1,0,1,0,1
-2,1,0,0,1,0
-2,1,0,1,1,0
-2,1,0,0,1,1
-2,1,0,1,1,1
-2,1,1,0,0,0
-2,1,1,1,0,0
-2,1,1,0,0,1
-2,1,1,1,0,1
-2,1,1,0,1,0
-2,1,1,1,1,0
-2,1,1,0,1,1
-2,1,1,1,1,1
+escort,shopping,othmaint,othdiscr,eatout,social,tot_tours
+0,0,0,0,0,0,0
+0,0,0,1,0,0,1
+0,0,0,0,0,1,1
+0,0,0,1,0,1,2
+0,0,0,0,1,0,1
+0,0,0,1,1,0,2
+0,0,0,0,1,1,2
+0,0,0,1,1,1,3
+0,0,1,0,0,0,1
+0,0,1,1,0,0,2
+0,0,1,0,0,1,2
+0,0,1,1,0,1,3
+0,0,1,0,1,0,2
+0,0,1,1,1,0,3
+0,0,1,0,1,1,3
+0,0,1,1,1,1,4
+0,1,0,0,0,0,1
+0,1,0,1,0,0,2
+0,1,0,0,0,1,2
+0,1,0,1,0,1,3
+0,1,0,0,1,0,2
+0,1,0,1,1,0,3
+0,1,0,0,1,1,3
+0,1,0,1,1,1,4
+0,1,1,0,0,0,2
+0,1,1,1,0,0,3
+0,1,1,0,0,1,3
+0,1,1,1,0,1,4
+0,1,1,0,1,0,3
+0,1,1,1,1,0,4
+0,1,1,0,1,1,4
+0,1,1,1,1,1,5
+1,0,0,0,0,0,1
+1,0,0,1,0,0,2
+1,0,0,0,0,1,2
+1,0,0,1,0,1,3
+1,0,0,0,1,0,2
+1,0,0,1,1,0,3
+1,0,0,0,1,1,3
+1,0,0,1,1,1,4
+1,0,1,0,0,0,2
+1,0,1,1,0,0,3
+1,0,1,0,0,1,3
+1,0,1,1,0,1,4
+1,0,1,0,1,0,3
+1,0,1,1,1,0,4
+1,0,1,0,1,1,4
+1,0,1,1,1,1,5
+1,1,0,0,0,0,2
+1,1,0,1,0,0,3
+1,1,0,0,0,1,3
+1,1,0,1,0,1,4
+1,1,0,0,1,0,3
+1,1,0,1,1,0,4
+1,1,0,0,1,1,4
+1,1,0,1,1,1,5
+1,1,1,0,0,0,3
+1,1,1,1,0,0,4
+1,1,1,0,0,1,4
+1,1,1,1,0,1,5
+1,1,1,0,1,0,4
+1,1,1,1,1,0,5
+1,1,1,0,1,1,5
+1,1,1,1,1,1,6
+2,0,0,0,0,0,2
+2,0,0,1,0,0,3
+2,0,0,0,0,1,3
+2,0,0,1,0,1,4
+2,0,0,0,1,0,3
+2,0,0,1,1,0,4
+2,0,0,0,1,1,4
+2,0,0,1,1,1,5
+2,0,1,0,0,0,3
+2,0,1,1,0,0,4
+2,0,1,0,0,1,4
+2,0,1,1,0,1,5
+2,0,1,0,1,0,4
+2,0,1,1,1,0,5
+2,0,1,0,1,1,5
+2,0,1,1,1,1,6
+2,1,0,0,0,0,3
+2,1,0,1,0,0,4
+2,1,0,0,0,1,4
+2,1,0,1,0,1,5
+2,1,0,0,1,0,4
+2,1,0,1,1,0,5
+2,1,0,0,1,1,5
+2,1,0,1,1,1,6
+2,1,1,0,0,0,4
+2,1,1,1,0,0,5
+2,1,1,0,0,1,5
+2,1,1,1,0,1,6
+2,1,1,0,1,0,5
+2,1,1,1,1,0,6
+2,1,1,0,1,1,6
+2,1,1,1,1,1,7
diff --git a/activitysim/examples/production_semcog/configs/non_mandatory_tour_frequency_alternatives.csv b/activitysim/examples/production_semcog/configs/non_mandatory_tour_frequency_alternatives.csv
index b9765aa75..09e89fae3 100644
--- a/activitysim/examples/production_semcog/configs/non_mandatory_tour_frequency_alternatives.csv
+++ b/activitysim/examples/production_semcog/configs/non_mandatory_tour_frequency_alternatives.csv
@@ -1,97 +1,97 @@
-escort,shopping,othmaint,othdiscr,eatout,social
-0,0,0,0,0,0
-0,0,0,1,0,0
-0,0,0,0,0,1
-0,0,0,1,0,1
-0,0,0,0,1,0
-0,0,0,1,1,0
-0,0,0,0,1,1
-0,0,0,1,1,1
-0,0,1,0,0,0
-0,0,1,1,0,0
-0,0,1,0,0,1
-0,0,1,1,0,1
-0,0,1,0,1,0
-0,0,1,1,1,0
-0,0,1,0,1,1
-0,0,1,1,1,1
-0,1,0,0,0,0
-0,1,0,1,0,0
-0,1,0,0,0,1
-0,1,0,1,0,1
-0,1,0,0,1,0
-0,1,0,1,1,0
-0,1,0,0,1,1
-0,1,0,1,1,1
-0,1,1,0,0,0
-0,1,1,1,0,0
-0,1,1,0,0,1
-0,1,1,1,0,1
-0,1,1,0,1,0
-0,1,1,1,1,0
-0,1,1,0,1,1
-0,1,1,1,1,1
-1,0,0,0,0,0
-1,0,0,1,0,0
-1,0,0,0,0,1
-1,0,0,1,0,1
-1,0,0,0,1,0
-1,0,0,1,1,0
-1,0,0,0,1,1
-1,0,0,1,1,1
-1,0,1,0,0,0
-1,0,1,1,0,0
-1,0,1,0,0,1
-1,0,1,1,0,1
-1,0,1,0,1,0
-1,0,1,1,1,0
-1,0,1,0,1,1
-1,0,1,1,1,1
-1,1,0,0,0,0
-1,1,0,1,0,0
-1,1,0,0,0,1
-1,1,0,1,0,1
-1,1,0,0,1,0
-1,1,0,1,1,0
-1,1,0,0,1,1
-1,1,0,1,1,1
-1,1,1,0,0,0
-1,1,1,1,0,0
-1,1,1,0,0,1
-1,1,1,1,0,1
-1,1,1,0,1,0
-1,1,1,1,1,0
-1,1,1,0,1,1
-1,1,1,1,1,1
-2,0,0,0,0,0
-2,0,0,1,0,0
-2,0,0,0,0,1
-2,0,0,1,0,1
-2,0,0,0,1,0
-2,0,0,1,1,0
-2,0,0,0,1,1
-2,0,0,1,1,1
-2,0,1,0,0,0
-2,0,1,1,0,0
-2,0,1,0,0,1
-2,0,1,1,0,1
-2,0,1,0,1,0
-2,0,1,1,1,0
-2,0,1,0,1,1
-2,0,1,1,1,1
-2,1,0,0,0,0
-2,1,0,1,0,0
-2,1,0,0,0,1
-2,1,0,1,0,1
-2,1,0,0,1,0
-2,1,0,1,1,0
-2,1,0,0,1,1
-2,1,0,1,1,1
-2,1,1,0,0,0
-2,1,1,1,0,0
-2,1,1,0,0,1
-2,1,1,1,0,1
-2,1,1,0,1,0
-2,1,1,1,1,0
-2,1,1,0,1,1
-2,1,1,1,1,1
+escort,shopping,othmaint,othdiscr,eatout,social,tot_tours
+0,0,0,0,0,0,0
+0,0,0,1,0,0,1
+0,0,0,0,0,1,1
+0,0,0,1,0,1,2
+0,0,0,0,1,0,1
+0,0,0,1,1,0,2
+0,0,0,0,1,1,2
+0,0,0,1,1,1,3
+0,0,1,0,0,0,1
+0,0,1,1,0,0,2
+0,0,1,0,0,1,2
+0,0,1,1,0,1,3
+0,0,1,0,1,0,2
+0,0,1,1,1,0,3
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+0,0,1,1,1,1,4
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+0,1,0,1,0,0,2
+0,1,0,0,0,1,2
+0,1,0,1,0,1,3
+0,1,0,0,1,0,2
+0,1,0,1,1,0,3
+0,1,0,0,1,1,3
+0,1,0,1,1,1,4
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+0,1,1,1,0,0,3
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+0,1,1,0,1,0,3
+0,1,1,1,1,0,4
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+1,0,0,0,0,0,1
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+1,0,0,0,0,1,2
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+1,0,0,0,1,1,3
+1,0,0,1,1,1,4
+1,0,1,0,0,0,2
+1,0,1,1,0,0,3
+1,0,1,0,0,1,3
+1,0,1,1,0,1,4
+1,0,1,0,1,0,3
+1,0,1,1,1,0,4
+1,0,1,0,1,1,4
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+1,1,0,0,0,0,2
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+1,1,0,1,1,0,4
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+1,1,1,0,1,0,4
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+2,0,0,0,0,0,2
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+2,0,0,0,0,1,3
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+2,0,0,1,1,0,4
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+2,0,0,1,1,1,5
+2,0,1,0,0,0,3
+2,0,1,1,0,0,4
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+2,0,1,1,0,1,5
+2,0,1,0,1,0,4
+2,0,1,1,1,0,5
+2,0,1,0,1,1,5
+2,0,1,1,1,1,6
+2,1,0,0,0,0,3
+2,1,0,1,0,0,4
+2,1,0,0,0,1,4
+2,1,0,1,0,1,5
+2,1,0,0,1,0,4
+2,1,0,1,1,0,5
+2,1,0,0,1,1,5
+2,1,0,1,1,1,6
+2,1,1,0,0,0,4
+2,1,1,1,0,0,5
+2,1,1,0,0,1,5
+2,1,1,1,0,1,6
+2,1,1,0,1,0,5
+2,1,1,1,1,0,6
+2,1,1,0,1,1,6
+2,1,1,1,1,1,7
diff --git a/activitysim/examples/prototype_arc/configs/non_mandatory_tour_frequency_alternatives.csv b/activitysim/examples/prototype_arc/configs/non_mandatory_tour_frequency_alternatives.csv
index b9765aa75..09e89fae3 100644
--- a/activitysim/examples/prototype_arc/configs/non_mandatory_tour_frequency_alternatives.csv
+++ b/activitysim/examples/prototype_arc/configs/non_mandatory_tour_frequency_alternatives.csv
@@ -1,97 +1,97 @@
-escort,shopping,othmaint,othdiscr,eatout,social
-0,0,0,0,0,0
-0,0,0,1,0,0
-0,0,0,0,0,1
-0,0,0,1,0,1
-0,0,0,0,1,0
-0,0,0,1,1,0
-0,0,0,0,1,1
-0,0,0,1,1,1
-0,0,1,0,0,0
-0,0,1,1,0,0
-0,0,1,0,0,1
-0,0,1,1,0,1
-0,0,1,0,1,0
-0,0,1,1,1,0
-0,0,1,0,1,1
-0,0,1,1,1,1
-0,1,0,0,0,0
-0,1,0,1,0,0
-0,1,0,0,0,1
-0,1,0,1,0,1
-0,1,0,0,1,0
-0,1,0,1,1,0
-0,1,0,0,1,1
-0,1,0,1,1,1
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-0,1,1,1,1,1
-1,0,0,0,0,0
-1,0,0,1,0,0
-1,0,0,0,0,1
-1,0,0,1,0,1
-1,0,0,0,1,0
-1,0,0,1,1,0
-1,0,0,0,1,1
-1,0,0,1,1,1
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-1,0,1,1,0,0
-1,0,1,0,0,1
-1,0,1,1,0,1
-1,0,1,0,1,0
-1,0,1,1,1,0
-1,0,1,0,1,1
-1,0,1,1,1,1
-1,1,0,0,0,0
-1,1,0,1,0,0
-1,1,0,0,0,1
-1,1,0,1,0,1
-1,1,0,0,1,0
-1,1,0,1,1,0
-1,1,0,0,1,1
-1,1,0,1,1,1
-1,1,1,0,0,0
-1,1,1,1,0,0
-1,1,1,0,0,1
-1,1,1,1,0,1
-1,1,1,0,1,0
-1,1,1,1,1,0
-1,1,1,0,1,1
-1,1,1,1,1,1
-2,0,0,0,0,0
-2,0,0,1,0,0
-2,0,0,0,0,1
-2,0,0,1,0,1
-2,0,0,0,1,0
-2,0,0,1,1,0
-2,0,0,0,1,1
-2,0,0,1,1,1
-2,0,1,0,0,0
-2,0,1,1,0,0
-2,0,1,0,0,1
-2,0,1,1,0,1
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diff --git a/activitysim/examples/prototype_mtc/configs/non_mandatory_tour_frequency_alternatives.csv b/activitysim/examples/prototype_mtc/configs/non_mandatory_tour_frequency_alternatives.csv
index b9765aa75..09e89fae3 100644
--- a/activitysim/examples/prototype_mtc/configs/non_mandatory_tour_frequency_alternatives.csv
+++ b/activitysim/examples/prototype_mtc/configs/non_mandatory_tour_frequency_alternatives.csv
@@ -1,97 +1,97 @@
-escort,shopping,othmaint,othdiscr,eatout,social
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+escort,shopping,othmaint,othdiscr,eatout,social,tot_tours
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diff --git a/activitysim/examples/prototype_mtc_extended/configs/non_mandatory_tour_frequency_alternatives.csv b/activitysim/examples/prototype_mtc_extended/configs/non_mandatory_tour_frequency_alternatives.csv
index 0bea47c6f..be633e649 100644
--- a/activitysim/examples/prototype_mtc_extended/configs/non_mandatory_tour_frequency_alternatives.csv
+++ b/activitysim/examples/prototype_mtc_extended/configs/non_mandatory_tour_frequency_alternatives.csv
@@ -1,100 +1,100 @@
-escort,shopping,othmaint,othdiscr,eatout,social
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-# extension for flexible ids demonstration,,,,,
-# should be removed for actual model run,,,,,
-0,0,0,2,0,0
+escort,shopping,othmaint,othdiscr,eatout,social,tot_tours
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+2,1,1,1,1,1,7
+# extension for flexible ids demonstration,,,,,,0
+# should be removed for actual model run,,,,,,0
+0,0,0,2,0,0,2
diff --git a/activitysim/examples/prototype_mwcog/configs/non_mandatory_tour_frequency_alternatives.csv b/activitysim/examples/prototype_mwcog/configs/non_mandatory_tour_frequency_alternatives.csv
index b9765aa75..09e89fae3 100644
--- a/activitysim/examples/prototype_mwcog/configs/non_mandatory_tour_frequency_alternatives.csv
+++ b/activitysim/examples/prototype_mwcog/configs/non_mandatory_tour_frequency_alternatives.csv
@@ -1,97 +1,97 @@
-escort,shopping,othmaint,othdiscr,eatout,social
-0,0,0,0,0,0
-0,0,0,1,0,0
-0,0,0,0,0,1
-0,0,0,1,0,1
-0,0,0,0,1,0
-0,0,0,1,1,0
-0,0,0,0,1,1
-0,0,0,1,1,1
-0,0,1,0,0,0
-0,0,1,1,0,0
-0,0,1,0,0,1
-0,0,1,1,0,1
-0,0,1,0,1,0
-0,0,1,1,1,0
-0,0,1,0,1,1
-0,0,1,1,1,1
-0,1,0,0,0,0
-0,1,0,1,0,0
-0,1,0,0,0,1
-0,1,0,1,0,1
-0,1,0,0,1,0
-0,1,0,1,1,0
-0,1,0,0,1,1
-0,1,0,1,1,1
-0,1,1,0,0,0
-0,1,1,1,0,0
-0,1,1,0,0,1
-0,1,1,1,0,1
-0,1,1,0,1,0
-0,1,1,1,1,0
-0,1,1,0,1,1
-0,1,1,1,1,1
-1,0,0,0,0,0
-1,0,0,1,0,0
-1,0,0,0,0,1
-1,0,0,1,0,1
-1,0,0,0,1,0
-1,0,0,1,1,0
-1,0,0,0,1,1
-1,0,0,1,1,1
-1,0,1,0,0,0
-1,0,1,1,0,0
-1,0,1,0,0,1
-1,0,1,1,0,1
-1,0,1,0,1,0
-1,0,1,1,1,0
-1,0,1,0,1,1
-1,0,1,1,1,1
-1,1,0,0,0,0
-1,1,0,1,0,0
-1,1,0,0,0,1
-1,1,0,1,0,1
-1,1,0,0,1,0
-1,1,0,1,1,0
-1,1,0,0,1,1
-1,1,0,1,1,1
-1,1,1,0,0,0
-1,1,1,1,0,0
-1,1,1,0,0,1
-1,1,1,1,0,1
-1,1,1,0,1,0
-1,1,1,1,1,0
-1,1,1,0,1,1
-1,1,1,1,1,1
-2,0,0,0,0,0
-2,0,0,1,0,0
-2,0,0,0,0,1
-2,0,0,1,0,1
-2,0,0,0,1,0
-2,0,0,1,1,0
-2,0,0,0,1,1
-2,0,0,1,1,1
-2,0,1,0,0,0
-2,0,1,1,0,0
-2,0,1,0,0,1
-2,0,1,1,0,1
-2,0,1,0,1,0
-2,0,1,1,1,0
-2,0,1,0,1,1
-2,0,1,1,1,1
-2,1,0,0,0,0
-2,1,0,1,0,0
-2,1,0,0,0,1
-2,1,0,1,0,1
-2,1,0,0,1,0
-2,1,0,1,1,0
-2,1,0,0,1,1
-2,1,0,1,1,1
-2,1,1,0,0,0
-2,1,1,1,0,0
-2,1,1,0,0,1
-2,1,1,1,0,1
-2,1,1,0,1,0
-2,1,1,1,1,0
-2,1,1,0,1,1
-2,1,1,1,1,1
+escort,shopping,othmaint,othdiscr,eatout,social,tot_tours
+0,0,0,0,0,0,0
+0,0,0,1,0,0,1
+0,0,0,0,0,1,1
+0,0,0,1,0,1,2
+0,0,0,0,1,0,1
+0,0,0,1,1,0,2
+0,0,0,0,1,1,2
+0,0,0,1,1,1,3
+0,0,1,0,0,0,1
+0,0,1,1,0,0,2
+0,0,1,0,0,1,2
+0,0,1,1,0,1,3
+0,0,1,0,1,0,2
+0,0,1,1,1,0,3
+0,0,1,0,1,1,3
+0,0,1,1,1,1,4
+0,1,0,0,0,0,1
+0,1,0,1,0,0,2
+0,1,0,0,0,1,2
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+0,1,0,0,1,0,2
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+0,1,0,0,1,1,3
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+0,1,1,1,0,0,3
+0,1,1,0,0,1,3
+0,1,1,1,0,1,4
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+0,1,1,1,1,0,4
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+1,0,0,0,1,1,3
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+2,1,0,0,0,0,3
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+2,1,0,1,1,1,6
+2,1,1,0,0,0,4
+2,1,1,1,0,0,5
+2,1,1,0,0,1,5
+2,1,1,1,0,1,6
+2,1,1,0,1,0,5
+2,1,1,1,1,0,6
+2,1,1,0,1,1,6
+2,1,1,1,1,1,7