输入格式是 W1=input() W2=input() 将两个数列的数据的差 然后按升序排列 结果用"[""]"括起来 每个数据之间加","

def f(n, m):
    if len(n) != len(m):
        return 0
    else:
        num = []
        for i in range(len(n)):
            num.append(int(n[i]))
            num.append(int(m[i]))
        for i in range(len(n) * 2 - 1):
            for j in range(len(n) * 2 - 1 - i):
                if num[j] > num[j + 1]:
                    num[j], num[j + 1] = num[j + 1], num[j]
        s = '['
        for i in range(len(num) - 1):
            s += str(num[i])
            s += ','
        s += str(num[len(num) - 1])
        s += ']'
        print(s)

W1 = input()
W2 = input()
f(W1, W2)