diff --git a/04/04-1.py b/04/04-1.py
new file mode 100644
index 0000000..f96647d
--- /dev/null
+++ b/04/04-1.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# file = "./ex.txt"
+file = "./input.txt"
+
+def less_than_four(x,y,field):
+    count = 0
+    for posx,posy in [(x-1,y-1),(x,y-1),(x+1,y-1),(x-1,y),(x+1,y),(x-1,y+1),(x,y+1),(x+1,y+1)]:
+        try:
+            if posx >= 0 and posy >= 0 and field[posx][posy] == "@":
+                count += 1
+        except IndexError:
+            pass
+    if count < 4:
+        return True
+    else:
+        return False
+
+if __name__ == "__main__":
+    solution = 0
+    game_field = []
+    input_file = open(file, "r")
+    for line in input_file:
+        line = line.strip()
+        if line == "":
+            continue
+        game_field.append(line)
+    input_file.close()
+
+    for i in range(len(game_field)):
+        for j in range(len(game_field[0])):
+            if game_field[i][j] == "@" and less_than_four(i,j,game_field):
+                solution += 1
+    print(f"Solution: {solution}")