#include <iostream>
using namespace std;

int main(){
	int Hit = 0 , Blow = 0;
	char a[4],b[4];
	while(cin >> a >> b){
		for(int i = 0; i < 4; i++){
			for(int j = 0; j < 4 ; j++){
				if(a[i] == a[j]) Blow++;
			}
		}

		for(int i = 0; i < 4; i++) {
			if(a[i] == b[i]) {
				Blow--;
				Hit++;
			}
		}

		cout << Hit << " " << Blow << "\n";
	}

}