diff --git a/labs05/task00.py b/labs05/task00.py
new file mode 100644
index 0000000..ea96b5e
--- /dev/null
+++ b/labs05/task00.py
@@ -0,0 +1,11 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+def suma(liczby):
+    pass
+
+def main():
+    print(summa([1, 2, 3, 4]))
+
+if __name__ == "__main__":
+    main()
diff --git a/labs05/task01.py b/labs05/task01.py
new file mode 100644
index 0000000..e69de29
diff --git a/labs05/task02.py b/labs05/task02.py
new file mode 100644
index 0000000..e69de29
diff --git a/labs05/task03.py b/labs05/task03.py
new file mode 100644
index 0000000..e69de29
diff --git a/labs05/task04.py b/labs05/task04.py
new file mode 100644
index 0000000..4dfc78c
--- /dev/null
+++ b/labs05/task04.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Implementacja narzedzia ``wc`` z linuksa (word counter).
+Zwraca liczbę słów, znaków i linii.
+"""
+
+import sys
+
+
+def count_lines(text):
+    """ return number of lines. """
+    return len(text.strip().split('\n'))
+
+def count_words(text):
+    """ return number of words. """
+    return sum([len([1 for word in line.split(' ') if len(word)])
+                for line in text.split('\n')])
+
+def count_chars(text):
+    """ return number of words. """
+    return len(text)
+
+def wc(text):
+    """ proper wc """
+    lines = count_lines(text)
+    words = count_words(text)
+    chars = count_chars(text)
+    return lines, words, chars
+
+
+def main():
+    """ main """
+    print(wc(sys.stdin.read()))
+
+
+if __name__ == "__main__":
+    main()