Question: 
Write a function to count the same pair in three given lists.


Model's Code:
def count_samepair(list1, list2, list3):
    count = 0
    for i in range(len(list1)):
        if list1[i] == list2[i] == list3[i]:
            count += 1
    return count



Sample Correct Code:
def count_samepair(list1,list2,list3):
    result = sum(m == n == o for m, n, o in zip(list1,list2,list3))
    return result


Asserts:
assert count_samepair([1,2,3,4,5,6,7,8],[2,2,3,1,2,6,7,9],[2,1,3,1,2,6,7,9])==3
assert count_samepair([1,2,3,4,5,6,7,8],[2,2,3,1,2,6,7,8],[2,1,3,1,2,6,7,8])==4
assert count_samepair([1,2,3,4,2,6,7,8],[2,2,3,1,2,6,7,8],[2,1,3,1,2,6,7,8])==5


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 142 of 974: 103/142 (72.53521126760563%): success