diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ca22c8f..fde3674 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -113,7 +113,17 @@ jobs:
       - name: Install Python tools
         run: cd bril/bril-txt ; flit install --symlink
 
+      - name: Install Turnt
+        # run: pip install turnt  # Use instead if pip turnt version >= 1.7
+        uses: actions/checkout@v4
+        with:
+          repository: cucapra/turnt
+          path: './turnt'
+      - name: Install Turnt part 2
+        run: cd turnt ; flit install --symlink
+
       - name: Test dataflow
         run: |
           cd lesson4/dataflow
           python3 check.py def ../../bril/benchmarks/**/*.bril ../../bril/examples/test/df/*.bril
+          cd turnt && turnt df_copied_from_bril/*.bril
diff --git a/lesson4/dataflow/check.py b/lesson4/dataflow/check.py
index 1da4780..3616f85 100644
--- a/lesson4/dataflow/check.py
+++ b/lesson4/dataflow/check.py
@@ -11,7 +11,7 @@ def check_file(args):
     (file, analysis) = args
     print(f"\x1b[33m{file} START\x1b[m")
     result = subprocess.run(
-        f"bril2json <{file} | cargo run --quiet -- --analysis {analysis}",
+        f"bril2json <{file} | cargo run --package dataflow --quiet -- --analysis {analysis}",
         shell=True,
         capture_output=True,
     )
diff --git a/lesson4/dataflow/src/reaching_definitions.rs b/lesson4/dataflow/src/reaching_definitions.rs
index b902f48..b4824e7 100644
--- a/lesson4/dataflow/src/reaching_definitions.rs
+++ b/lesson4/dataflow/src/reaching_definitions.rs
@@ -67,7 +67,7 @@ pub fn reaching_definitions(cfg: &FunctionCfg) {
         }
         inputs
     }
-    println!("\x1b[33;1m@{}\x1b[m {{", cfg.signature.name);
+    println!("@{} {{", cfg.signature.name);
     for (block, solution) in solve_dataflow(
         cfg,
         Direction::Forward,
@@ -86,10 +86,17 @@ pub fn reaching_definitions(cfg: &FunctionCfg) {
         transfer,
     ) {
         if let Some(label) = &cfg.vertices[block].label {
-            println!("\x1b[1;33m  .{}:\x1b[m", label.name);
+            println!("  .{}", label.name);
         }
-        for definition in &solution {
-            println!("\x1b[2m    {} = {:?}\x1b[m", definition.0, definition.1);
+        let mut printouts = solution
+            .iter()
+            .map(|definition| {
+                format!("    {} = {:?}", definition.0, definition.1)
+            })
+            .collect::<Vec<_>>();
+        printouts.sort();
+        for printout in printouts {
+            println!("{}", printout);
         }
 
         for definition in solution {
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.bril b/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.bril
new file mode 100644
index 0000000..1c17264
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.bril
@@ -0,0 +1,16 @@
+@main(cond: bool) {
+  a: int = const 47;
+  b: int = const 42;
+  br cond .left .right;
+.left:
+  b: int = const 1;
+  c: int = const 5;
+  jmp .end;
+.right:
+  a: int = const 2;
+  c: int = const 10;
+  jmp .end;
+.end:
+  d: int = sub a c;
+  print d;
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.def.out b/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.def.out
new file mode 100644
index 0000000..a516b11
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.def.out
@@ -0,0 +1,24 @@
+@main {
+    a = Constant("47", false)
+    b = Constant("42", false)
+    cond = Argument
+  .left
+    a = Constant("47", false)
+    b = Constant("1", false)
+    c = Constant("5", false)
+    cond = Argument
+  .right
+    a = Constant("2", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    cond = Argument
+  .end
+    a = Constant("2", false)
+    a = Constant("47", false)
+    b = Constant("1", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    c = Constant("5", false)
+    cond = Argument
+    d = Op("sub", ["a", "c"], [], [])
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.defined.out b/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.defined.out
new file mode 100644
index 0000000..a516b11
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/cond-args.defined.out
@@ -0,0 +1,24 @@
+@main {
+    a = Constant("47", false)
+    b = Constant("42", false)
+    cond = Argument
+  .left
+    a = Constant("47", false)
+    b = Constant("1", false)
+    c = Constant("5", false)
+    cond = Argument
+  .right
+    a = Constant("2", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    cond = Argument
+  .end
+    a = Constant("2", false)
+    a = Constant("47", false)
+    b = Constant("1", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    c = Constant("5", false)
+    cond = Argument
+    d = Op("sub", ["a", "c"], [], [])
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/cond.bril b/lesson4/dataflow/turnt/df_copied_from_bril/cond.bril
new file mode 100644
index 0000000..0b0ceef
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/cond.bril
@@ -0,0 +1,17 @@
+@main {
+  a: int = const 47;
+  b: int = const 42;
+  cond: bool = const true;
+  br cond .left .right;
+.left:
+  b: int = const 1;
+  c: int = const 5;
+  jmp .end;
+.right:
+  a: int = const 2;
+  c: int = const 10;
+  jmp .end;
+.end:
+  d: int = sub a c;
+  print d;
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/cond.def.out b/lesson4/dataflow/turnt/df_copied_from_bril/cond.def.out
new file mode 100644
index 0000000..fadfbdb
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/cond.def.out
@@ -0,0 +1,24 @@
+@main {
+    a = Constant("47", false)
+    b = Constant("42", false)
+    cond = Constant("true", false)
+  .left
+    a = Constant("47", false)
+    b = Constant("1", false)
+    c = Constant("5", false)
+    cond = Constant("true", false)
+  .right
+    a = Constant("2", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    cond = Constant("true", false)
+  .end
+    a = Constant("2", false)
+    a = Constant("47", false)
+    b = Constant("1", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    c = Constant("5", false)
+    cond = Constant("true", false)
+    d = Op("sub", ["a", "c"], [], [])
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/cond.defined.out b/lesson4/dataflow/turnt/df_copied_from_bril/cond.defined.out
new file mode 100644
index 0000000..fadfbdb
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/cond.defined.out
@@ -0,0 +1,24 @@
+@main {
+    a = Constant("47", false)
+    b = Constant("42", false)
+    cond = Constant("true", false)
+  .left
+    a = Constant("47", false)
+    b = Constant("1", false)
+    c = Constant("5", false)
+    cond = Constant("true", false)
+  .right
+    a = Constant("2", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    cond = Constant("true", false)
+  .end
+    a = Constant("2", false)
+    a = Constant("47", false)
+    b = Constant("1", false)
+    b = Constant("42", false)
+    c = Constant("10", false)
+    c = Constant("5", false)
+    cond = Constant("true", false)
+    d = Op("sub", ["a", "c"], [], [])
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/fact.bril b/lesson4/dataflow/turnt/df_copied_from_bril/fact.bril
new file mode 100644
index 0000000..b5def64
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/fact.bril
@@ -0,0 +1,22 @@
+@main {
+  result: int = const 1;
+  i: int = const 8;
+
+.header:
+  # Enter body if i >= 0.
+  zero: int = const 0;
+  cond: bool = gt i zero;
+  br cond .body .end;
+
+.body:
+  result: int = mul result i;
+
+  # i--
+  one: int = const 1;
+  i: int = sub i one;
+
+  jmp .header;
+
+.end:
+  print result;
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/fact.def.out b/lesson4/dataflow/turnt/df_copied_from_bril/fact.def.out
new file mode 100644
index 0000000..576162c
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/fact.def.out
@@ -0,0 +1,26 @@
+@main {
+    i = Constant("8", false)
+    result = Constant("1", false)
+  .header
+    cond = Op("gt", ["i", "zero"], [], [])
+    i = Constant("8", false)
+    i = Op("sub", ["i", "one"], [], [])
+    one = Constant("1", false)
+    result = Constant("1", false)
+    result = Op("mul", ["result", "i"], [], [])
+    zero = Constant("0", false)
+  .body
+    cond = Op("gt", ["i", "zero"], [], [])
+    i = Op("sub", ["i", "one"], [], [])
+    one = Constant("1", false)
+    result = Op("mul", ["result", "i"], [], [])
+    zero = Constant("0", false)
+  .end
+    cond = Op("gt", ["i", "zero"], [], [])
+    i = Constant("8", false)
+    i = Op("sub", ["i", "one"], [], [])
+    one = Constant("1", false)
+    result = Constant("1", false)
+    result = Op("mul", ["result", "i"], [], [])
+    zero = Constant("0", false)
+}
diff --git a/lesson4/dataflow/turnt/df_copied_from_bril/fact.defined.out b/lesson4/dataflow/turnt/df_copied_from_bril/fact.defined.out
new file mode 100644
index 0000000..576162c
--- /dev/null
+++ b/lesson4/dataflow/turnt/df_copied_from_bril/fact.defined.out
@@ -0,0 +1,26 @@
+@main {
+    i = Constant("8", false)
+    result = Constant("1", false)
+  .header
+    cond = Op("gt", ["i", "zero"], [], [])
+    i = Constant("8", false)
+    i = Op("sub", ["i", "one"], [], [])
+    one = Constant("1", false)
+    result = Constant("1", false)
+    result = Op("mul", ["result", "i"], [], [])
+    zero = Constant("0", false)
+  .body
+    cond = Op("gt", ["i", "zero"], [], [])
+    i = Op("sub", ["i", "one"], [], [])
+    one = Constant("1", false)
+    result = Op("mul", ["result", "i"], [], [])
+    zero = Constant("0", false)
+  .end
+    cond = Op("gt", ["i", "zero"], [], [])
+    i = Constant("8", false)
+    i = Op("sub", ["i", "one"], [], [])
+    one = Constant("1", false)
+    result = Constant("1", false)
+    result = Op("mul", ["result", "i"], [], [])
+    zero = Constant("0", false)
+}
diff --git a/lesson4/dataflow/turnt/turnt.toml b/lesson4/dataflow/turnt/turnt.toml
new file mode 100644
index 0000000..2400b23
--- /dev/null
+++ b/lesson4/dataflow/turnt/turnt.toml
@@ -0,0 +1,11 @@
+[envs.def]
+command = "bril2json < {filename} | cargo run --quiet -- --analysis def"
+output."def.out" = "-"
+
+# [envs.live]
+# command = "bril2json < {filename} | python3 ../../df.py live"
+# output."live.out" = "-"
+#
+# [envs.cprop]
+# command = "bril2json < {filename} | python3 ../../df.py cprop"
+# output."cprop.out" = "-"