diff --git a/elisa_pl.py b/elisa_pl.py
index 4648e70..c2cbde9 100644
--- a/elisa_pl.py
+++ b/elisa_pl.py
@@ -1 +1,67 @@
-print("Hello, World!")
\ No newline at end of file
+from ast import arg
+from dataclasses import replace
+import re
+import random
+
+ARG_LITERAL = '%'
+MAX_ARGS = 5
+GOODBYES =["Do zobaczenia", "Elo"]
+QUIT = "wyjscie"
+
+pairs = ( ('test (.*)', ('%1',)), ('(.*) test2 (.*)', ('%1 2 %2',)), ('test2 (.*)', ('%1 2',)) )
+
+
+def main():
+    is_running = True
+    while is_running:
+        user_input = input().lower()
+
+        if should_quit(user_input):
+            is_running = False
+            continue
+
+        for pair in pairs:
+            search = re.search(pair[0].lower(), user_input)
+
+            if not search:
+                continue
+
+            ans = pick_answer(pair)
+            print(replace_args(ans, search))
+            break;
+
+    print(random.choice(GOODBYES))
+
+
+def should_quit(input):
+    return QUIT in input
+
+
+def get_full_arg_str(arg_number):
+    return ARG_LITERAL + str(arg_number)
+
+
+def replace_args(pattern, match):
+    arg_number = 1
+    result = pattern
+    while arg_number <= MAX_ARGS:
+        if get_full_arg_str(arg_number) in result:
+            result = substitute_arg(result, match.group(arg_number), arg_number)
+        arg_number += 1
+
+    return result
+
+
+def substitute_arg(pattern, sub, group_number):
+    arg = get_full_arg_str(group_number)
+    return pattern.replace(arg, sub)
+
+
+def pick_answer(pair):
+    assert len(pair) == 2
+    idx = random.randint(0, len(pair[1]) - 1)
+    return pair[1][idx]
+
+
+if __name__ == "__main__":
+   main()
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