Move 2015 out of the way.

2015/day-04/input.txt

@@ -0,0 +1 @@
+bgvyzdsv

2015/day-04/solution.py

@@ -0,0 +1,32 @@
+from __future__ import print_function
+import sys
+from hashlib import md5
+import fileinput
+
+def ok(digest, zeroes):
+    for c in digest[0:zeroes]:
+        if c != "0":
+            return False
+
+    return True
+
+def solve(word, zeroes):
+    number = 0
+
+    while True:
+        digester = md5(word.encode("utf-8"))
+        digester.update(str(number).encode("utf-8"))
+
+        if ok(digester.hexdigest(), zeroes):
+            print(word, number)
+            break
+
+        number = number + 1
+
+    return number
+
+for line in fileinput.input():
+    word = line.strip()
+
+    solve(word, 5)
+    solve(word, 6)