diff --git a/2015/day4/input b/2015/day4/input
new file mode 100644
index 0000000..bf3e46f
--- /dev/null
+++ b/2015/day4/input
@@ -0,0 +1 @@
+bgvyzdsv
diff --git a/2015/day4/part1.py b/2015/day4/part1.py
new file mode 100644
index 0000000..d227e50
--- /dev/null
+++ b/2015/day4/part1.py
@@ -0,0 +1,31 @@
+#!/bin/python3
+
+import sys
+from pprint import pprint
+import hashlib
+
+input_f = sys.argv[1]
+
+result = 0
+count = 0
+found = False
+with open(input_f) as file:
+    for line in file:
+        tmp = line.rstrip()
+        while found == False:
+            m = hashlib.md5()
+            text = tmp + str(count)
+            #print(text)
+            m.update(text.encode('UTF-8'))
+            nr = m.hexdigest()
+            #print(nr)
+
+            if nr[0:5] == '00000':
+                print(count)
+                print(text)
+                print(nr)
+                found = True
+            else:
+                count += 1
+            #print(nr[ 0 : 5 ])
+        found = False
diff --git a/2015/day4/test b/2015/day4/test
new file mode 100644
index 0000000..e083919
--- /dev/null
+++ b/2015/day4/test
@@ -0,0 +1,2 @@
+abcdef
+pqrstuv