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