diff --git a/labs02/task02.py b/labs02/task02.py
index a6d6321..280246a 100644
--- a/labs02/task02.py
+++ b/labs02/task02.py
@@ -6,7 +6,11 @@
 """
 
 def days_in_year(days):
-    pass
+    if days % 4 == 0 and days % 100 > 0 or days % 400 == 0:
+        return 366
+    else:
+        return 365
+
 
 def tests(f):
     inputs = [[2015], [2012], [1900], [2400], [1977]]
diff --git a/labs02/task03.py b/labs02/task03.py
index a1c3a85..50567e6 100644
--- a/labs02/task03.py
+++ b/labs02/task03.py
@@ -13,7 +13,11 @@ jak 'set', która przechowuje elementy bez powtórzeń.)
 
 
 def oov(text, vocab):
-    pass
+    rett = list()
+    for s in text.lower().split():
+        if not s in vocab:
+            rett.append(s)
+    return set(rett)
 
 
 
diff --git a/labs02/task04.py b/labs02/task04.py
index 37413f1..4c73a83 100644
--- a/labs02/task04.py
+++ b/labs02/task04.py
@@ -7,7 +7,12 @@ Jeśli podany argument jest mniejszy od 1 powinna być zwracana wartość 0.
 """
 
 def sum_from_one_to_n(n):
-    pass
+    if n < 1:
+        return 0
+    sum = 0
+    for i in range(n+1):
+        sum += i
+    return sum
 
 
 def tests(f):
diff --git a/labs02/task05.py b/labs02/task05.py
index f59268a..8dda0e1 100644
--- a/labs02/task05.py
+++ b/labs02/task05.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
+import math as mt
 
 """
 Napisz funkcję euclidean_distance obliczającą odległość między
@@ -10,7 +11,15 @@ np. odległość pomiędzy punktami (0, 0, 0) i (3, 4, 0) jest równa 5.
 """
 
 def euclidean_distance(x, y):
-    pass
+    x1 = x[0]
+    y1 = x[1]
+    z1 = x[2]
+
+    x2 = y[0]
+    y2 = y[1]
+    z2 = y[2]
+
+    return mt.sqrt((x1 - x2)**2 + (y1 - y2)**2 + (z1 - z2)**2)
 
 def tests(f):
     inputs = [[(2.3, 4.3, -7.5), (2.3, 8.5, -7.5)]]
diff --git a/labs02/task06.py b/labs02/task06.py
index ff4a9d3..0e8c103 100644
--- a/labs02/task06.py
+++ b/labs02/task06.py
@@ -10,7 +10,13 @@ ma być zwracany napis "It's not a Big 'No!'".
 """
 
 def big_no(n):
-    pass
+    if n < 5:
+        return "It's not a Big 'No!'"
+    t = list('N')
+    for i in range(n):
+        t.append('O')
+    return ''.join(t) + '!'
+
 
 def tests(f):
     inputs = [[5], [6], [2]]
diff --git a/labs02/task07.py b/labs02/task07.py
index 80cbd37..557c0e9 100644
--- a/labs02/task07.py
+++ b/labs02/task07.py
@@ -6,7 +6,10 @@ Napisz funkcję char_sum, która dla zadanego łańcucha zwraca
 sumę kodów ASCII znaków.
 """
 def char_sum(text):
-    pass
+    s = 0
+    for z in text:
+        s +=ord(z)
+    return s
 
 def tests(f):
     inputs = [["this is a string"], ["this is another string"]]
diff --git a/labs02/task08.py b/labs02/task08.py
index 252b10d..30b6758 100644
--- a/labs02/task08.py
+++ b/labs02/task08.py
@@ -7,7 +7,11 @@ przez 3 lub 5 mniejszych niż n.
 """
 
 def sum_div35(n):
-    pass
+    s = 0
+    for i in range(n):
+        if (i % 3 == 0) or (i % 5 == 0):
+            s+=i
+    return s
 
 def tests(f):
     inputs = [[10], [100], [3845]]
diff --git a/labs02/task09.py b/labs02/task09.py
index 9045054..95116a4 100644
--- a/labs02/task09.py
+++ b/labs02/task09.py
@@ -7,9 +7,17 @@ na podobnie wyglądające cyfry: 'e' na '3', 'l' na '1', 'o' na '0', 't' na '7'.
 Np. leet('leet') powinno zwrócić '1337'.
 """
 
+import string
 
 def leet_speak(text):
-    pass
+    dt = {"e":"3", "l":"1", "o":"0", "t":"7"}
+    ltx = text.lower()
+    ret = text + ""
+    for k in list(ltx):
+        v = dt.get(k)
+        if v is not None:
+            ret = ret.replace(k, v)
+    return ret
 
 
 def tests(f):
diff --git a/labs02/task10.py b/labs02/task10.py
index f380f0a..224f3f5 100644
--- a/labs02/task10.py
+++ b/labs02/task10.py
@@ -7,13 +7,19 @@ Napisz funkcję pokemon_speak, która zamienia w podanym napisie co drugą liter
 na wielką. Np. pokemon_speak('pokemon') powinno zwrócić 'PoKeMoN'.
 """
 
+import string as str
 
 def pokemon_speak(text):
-    pass
+    lt = list(text)
+    for i in range(len(lt)):
+       if i%2 == 0:
+            lt[i] = lt[i].upper()
+    return ''.join(lt)
+
 
 
 def tests(f):
-    inputs = [['pokemon'], ['do not want'], 'POKEMON']
+    inputs = [['pokemon'], ['do not want'], ['POKEMON']]
     outputs = ['PoKeMoN', 'Do nOt wAnT', 'POKEMON']
 
     for input, output in zip(inputs, outputs):
diff --git a/labs02/task11.py b/labs02/task11.py
index 7d36767..d3024d3 100644
--- a/labs02/task11.py
+++ b/labs02/task11.py
@@ -9,8 +9,13 @@ Oba napisy będą składać się wyłacznie z małych liter.
 """
 
 def common_chars(string1, string2):
-    pass
-
+    t1 = list(''.join(string1.split(' ')))
+    t2 = list(''.join(string2.split(' ')))
+    rett = list()
+    for lit in t1:
+        if lit in t2:
+            rett.append(lit)
+    return sorted(set(rett))
 
 def tests(f):
     inputs = [["this is a string", "ala ma kota"]]
diff --git a/labs02/test_task.py b/labs02/test_task.py
index 5879768..d8fb9a6 100755
--- a/labs02/test_task.py
+++ b/labs02/test_task.py
@@ -6,7 +6,7 @@ def suma(a, b):
     """
     Napisz funkcję, która zwraca sumę elementów.
     """
-    pass
+    return a+b
 
 def tests(f):
     inputs = [(2, 3), (0, 0), (1, 1)]