diff --git a/TaskC03/solution.py b/TaskC03/solution.py
new file mode 100644
index 0000000..4858bb0
--- /dev/null
+++ b/TaskC03/solution.py
@@ -0,0 +1,13 @@
+import re
+import sys
+
+def is_valid_nip(line: str) -> bool:
+    # matching either:
+    # xxx-xxx-xx-xx  OR  xxx-xx-xx-xxx
+    p = re.compile(r'^(?:\d{3}-\d{3}-\d{2}-\d{2}|\d{3}-\d{2}-\d{2}-\d{3})$')
+    return bool(p.match(line))
+
+if __name__ == "__main__":
+    for line in sys.stdin:
+        stripped_line = line.strip()
+        print("yes" if is_valid_nip(stripped_line) else "no")
diff --git a/TaskC03/test.out b/TaskC03/test.out
new file mode 100644
index 0000000..29fe7aa
--- /dev/null
+++ b/TaskC03/test.out
@@ -0,0 +1,5 @@
+yes
+yes
+yes
+no
+no