#include <iostream>
#include <cstring>
using namespace std;
 
const int MAX_LENGTH = 2000;
 
int main() {
	char a[MAX_LENGTH], b[MAX_LENGTH];
	cin.getline(a,MAX_LENGTH);
	cin.getline(b,MAX_LENGTH);
	int lengthA = strlen(a);
	int lengthB = strlen(b);
	char *p = strstr(a, b);
 
	//cout << lengthA <<" " << lengthB;
 
	if (strcmp(a,b) == 0) {
		cout <<a << b;
	}
 
	while (p != 0) {
		cout << p - a;
		p = strstr(p + 1, b );
	}
	if (p == 0)  {
		for ( int i = 0; i < (lengthA + lengthB); ++i) {
			cout << a[i] << b[i];
		}
	}
	cout << p;
	return 0;
}

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