#include<iostream>
#include<cstdio>
using namespace std;
int main() {
	int a, b, c, d;
	int z, x, n, v;
	scanf("%d.%d.%d.%d",&a,&b,&c,&d);
	scanf("%d.%d.%d.%d", &z, &x, &n, &v);
	int k = a&z,l=b&x,m=c&n,o=d&v

	cout << dec << k<< "." << l << "." << m << "." << o << endl;
	
	return 0;
}

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