Initial data commit

Task/Department-numbers/JavaScript/department-numbers-3.js

@@ -0,0 +1,22 @@
+(() => {
+    "use strict";
+
+    const
+        label = "(Police, Sanitation, Fire)",
+        solutions = [2, 4, 6]
+        .flatMap(
+            x => [1, 2, 3, 4, 5, 6, 7]
+            .flatMap(
+                y => [12 - (x + y)]
+                .flatMap(
+                    z => z !== y && 1 <= z && z <= 7 ? [
+                        [x, y, z]
+                    ] : []
+                )
+            )
+        )
+        .map(JSON.stringify)
+        .join("\n");
+
+    return `${label}\n${solutions}`;
+})();