diff --git a/intro/Task102.py b/intro/Task102.py
index c118896..1391e4b 100644
--- a/intro/Task102.py
+++ b/intro/Task102.py
@@ -1,8 +1,8 @@
-#!/usr/bin/python
-# -*- coding: utf-8 -*-
-
-"""Rozwiązanie zadania 102."""
-
-def add_three_numbers(abc, bcd, cde):
-    """komentarz bo musi byc."""
-    return abc+bcd+cde
+"""Task 102"""
+
+def add_three_numbers(liczba1, liczba2, liczba3):
+
+    return liczba1 + liczba2 + liczba3
+
+if __name__ == '__main__':
+    print add_three_numbers(5, 7, -3)
diff --git a/intro/Task104.py b/intro/Task104.py
index a95d06b..e44f482 100644
--- a/intro/Task104.py
+++ b/intro/Task104.py
@@ -1,13 +1,16 @@
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """Rozwiązanie zadania 104."""
 
-def fahrenheit(temperature):
-    """Convert Celsius to Fahrenheit"""
-    if temperature < -273.15:
-        return -459.67
-
-    return temperature * 9.0/5.0 + 32
+def sum_from_one_to_n(number):
+    """Placeholder"""
+    if number < 1:
+        return 0
+    ret = 0
+    for ile in range(1, number + 1):
+        ret += ile * ile
+    return ret
 
 if __name__ == '__main__':
-    print fahrenheit(10)
+    print sum_from_one_to_n(2015)
diff --git a/intro/Task105.py b/intro/Task105.py
index 84663bd..50b25b6 100644
--- a/intro/Task105.py
+++ b/intro/Task105.py
@@ -1,17 +1,14 @@
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """Rozwiązanie zadania 105."""
 
-def is_almost_prime(number, limit):
-    """Checks if number can not be divided with limit offset"""
-    if number < 0:
-        return False
+def change_first(tuple_t, element_e):
+    """Docstring for Pylint points"""
+    if not tuple_t:
+        return ()
 
-    for i in range(2, limit + 1):
-        if number%i == 0:
-            return False
-
-    return True
-
-if __name__ == '__main__':
-    print is_almost_prime(5, 10)
+    tuple_list = list(tuple_t)
+    tuple_list[0] = element_e
+    new_tuple = tuple(tuple_list)
+    return new_tuple
diff --git a/intro/Task106.py b/intro/Task106.py
index 665169b..a155fd6 100644
--- a/intro/Task106.py
+++ b/intro/Task106.py
@@ -1,11 +1,15 @@
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """Rozwiązanie zadania 106."""
 
-def penultimate(array, otherwise):
-    "sprawdz liste"
-    length = len(array)
-    if length <= 1:
-        return otherwise
-    else:
-        return array[length - 2]
+def freq_dic(seq):
+    """Placeholder"""
+    dictionary = {}
+
+    for xxx in seq:
+        if dictionary.has_key(xxx):
+            dictionary[xxx] += 1
+        else:
+            dictionary[xxx] = 1
+    return dictionary