poj3589 水题

 /*
Time:2019.11.29
Author: Goven
type：水题 
err:
ref:
*/
#include<iostream>

using namespace std;

int main()
{
    int t;
    char a[5], b[5];
    cin >> t;
    while (t--) {
        cin >> a >> b;
        int cnta = 0, cntb = 0;
        for (int i = 0; i < 4; i++) {
            if (a[i] == b[i]) cnta++;
        }
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 4; j++) {
                if (a[i] == b[j]) cntb++;
            }
        }
        cntb -= cnta;
        printf("%dA%dB\n", cnta, cntb);
    }
    return 0;
}