diff --git a/hello_world.py b/hello_world.py
new file mode 100644
index 0000000..9e5a0ef
--- /dev/null
+++ b/hello_world.py
@@ -0,0 +1,16 @@
+def foo(char, l = []):
+    l.append(char)
+    return "".join(l)
+
+foo("H")
+foo("e")
+foo("l")
+foo("l")
+foo("o")
+foo(" ")
+foo("W")
+foo("o")
+foo("r")
+foo("l")
+foo("d")
+print(foo("!"))
\ No newline at end of file