1 files changed, 27 insertions, 0 deletions
diff --git a/challenge-194/roger-bell-west/python/ch-2.py b/challenge-194/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..568621d839
--- /dev/null
+++ b/challenge-194/roger-bell-west/python/ch-2.py
@@ -0,0 +1,27 @@
+#! /usr/bin/python3
+
+import unittest
+from collections import defaultdict
+
+def frequencyequalizer(s):
+  f = defaultdict(lambda: 0)
+  for c in s:
+    f[c] += 1
+  v = list(f.values())
+  v.sort()
+  if v[0] == v[-2] and v[0] + 1 == v[-1]:
+    return True
+  return False
+
+class TestFrequencyEqualizer(unittest.TestCase):
+
+  def test_ex1(self):
+    self.assertEqual(frequencyequalizer("abbc"), True, 'example 1')
+
+  def test_ex2(self):
+    self.assertEqual(frequencyequalizer("xyzyyxz"), True, 'example 2')
+
+  def test_ex3(self):
+    self.assertEqual(frequencyequalizer("xzxz"), False, 'example 3')
+
+unittest.main()