Suma krotek

def sum_tuples(tuples_list):
    result_list = []
    for i in tuples_list:
        result_list.append(i[0] + i[1])
    return result_list

list1 = [(1,2),(3,4),(5,6),(7,8)]
list2 = [('a','b'), ('a','c'), ('b','c')]

print(sum_tuples(list1))
print(sum_tuples(list2))