#include<stdio.h>
     #include<stdlib.h>
     #include<string.h>
     
     int main(void){
         while(1){
            char c1, c2, n[100], *ch;
             scanf("%s %c %c ", n, &c1, &c2);
             if(n[0] == '0' && n[1] == 0 && c1 == '0' && c2 == '0')
                break;
            for (int i = 0 ; i < strlen(n) ; i++)
                if(n[i] == c1)
                    n[i] = c2;
            printf("%d\n", atoi(n));
       }
     return 0;
  }