#include<stdio.h>
#include<stdlib.h>
int main()
{
    long numar,final=0;
    int c1,c2,*v,i=0,j;
    v=malloc(100000*sizeof(int));
    scanf("%ld %d %d",&numar,&c1,&c2);
    if(numar!=0 )
        {while(numar!=0)
        {
            v[i]=numar%10;
            i++;
            numar/=10;
        }
        for(j=0;j<i;j++)
            if(v[j]==c1)
                v[j]=c2;
        for(j=i-1;j>=0;j--)
            final=final*10+v[j];
        printf("%ld",final);


}
}