Refactor, breaking code into modules.

test_solver.py

@@ -0,0 +1,25 @@
+#!/usr/bin/python
+
+import unittest
+
+import solver
+
+
+class TestSolver(unittest.TestCase):
+    def test_scored_words(self):
+        """Minimal end to end test."""
+        result = solver.scored_words()
+
+        expected = [
+            ("cares", 139631),
+            ("sanes", 139129),
+            ("tares", 138755),
+            ("bares", 138375),
+            ("sales", 137491),
+        ]
+
+        self.assertListEqual(result[:5], expected)
+
+
+if __name__ == "__main__":
+    unittest.main()