Solutions for day 5.

day5.py

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+import fileinput
+import re
+
+nice1 = 0
+nice2 = 0
+
+doubleletter = re.compile(r"(.)\1")
+vowels = re.compile(r"[aeiou]")
+forbidden = re.compile(r"ab|cd|pq|xy")
+
+inbetween = re.compile(r"(.).\1")
+twodouble = re.compile(r"(.)(.)(.*?)\1\2")
+
+for line in fileinput.input():
+    if len(vowels.findall(line)) >= 3 and doubleletter.search(line) and not forbidden.search(line):
+        nice1 += 1
+
+    if inbetween.search(line) and twodouble.search(line):
+        nice2 += 1
+
+print nice1, "nice1 strings."
+print nice2, "nice2 strings."