diff --git a/leetcode/1786-count-the-number-of-consistent-strings/solution.rs b/leetcode/1786-count-the-number-of-consistent-strings/solution.rs
new file mode 100644
index 0000000..3fa130e
--- /dev/null
+++ b/leetcode/1786-count-the-number-of-consistent-strings/solution.rs
@@ -0,0 +1,8 @@
+impl Solution {
+    pub fn count_consistent_strings(allowed: String, words: Vec<String>) -> i32 {
+        let allowed: std::collections::HashSet<_> = allowed.chars().collect();
+        words.iter()
+            .filter(|w| w.chars().all(|c| allowed.contains(&c)))
+            .count() as i32
+    }
+}