#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main()
{
	char n[100001], c1, c2;
	int i, k = 0;

	scanf("%s %c %c",n,&c1,&c2);

	while (n[0] != '0' || (c1 != '0' && c2 != '0') )
	{
		k++;

		for (i = 0; i < strlen(n); i++)
		{
			if (n[i] == c1)
			{
				n[i] = c2;
			}
		}

		printf("%d\n",strtol(n,NULL,10));

		scanf("%s %c %c",n,&c1,&c2);
	}

	return 0;
}