KOREATECH 1116: 짝궁 문자열

Link : judge.koreatech.ac.kr/problem.php?id=1116

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Python

from sys import stdin
 
testcase = int(stdin.readline().strip())
 
while testcase:
    x, y = list(map(str, stdin.readline().strip().split()))
    stack = []
    if len(x) == len(y):
        for idx in range(len(x)):
            if x[idx] != y[idx]:
                stack.append((x[idx], y[idx]))
        if len(stack) == 0:
            print('yes')
        elif len(stack) == 2:
            if stack[0][0] == stack[1][1] and stack[0][1] == stack[1][0]:
                print('yes')
            else:
                print('no')
        else:
            print('no')
 
    else:
        print('no')
 
    testcase -= 1
 

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