message: Update simplified-fractions.py
diff: @@ -14,4 +14,4 @@ class Solution(object):
  for a in xrange(1, b):
  g = fractions.gcd(a, b)
  lookup.add((a//g, b//g))
  - return ["{}/{}".format(*fr) for fr in lookup]
  + return map(lambda x: "{}/{}".format(*x), lookup)
  