1A2B_2

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include<stdbool.h>

int main()
{
	int num1, num2;
	int array1[4], array2[4];
	int x = 0, y = 0;
	scanf("%d%d", &num1, &num2);
	for (int i = 0; i < 4; i++) {
		array1[3 - i] = num1 % 10;
		array2[3 - i] = num2 % 10;
		num1 = num1 / 10;
		num2 = num2 / 10;
	}
	for (int j = 0; j < 4; j++) {
		for (int k = 0; k < 4; k++) {
			while (array1[j] == array2[k]) {
				if (j == k) {
					x = x + 1;
				}
				else {
					y = y + 1;
				}
				break;
			}
		}

	}
	printf("%dA%dB", x, y);

}