#include<iostream>
#include <sstream>
#include <string.h>

using namespace std;

int n,c1,c2,c3,m;
char s[10];

int main()
{
cin>>s;
cin>>c1>>c2;
c3=atoi(s);

while(c1!=0||c2!=0||c3!=0)
{
m=strlen(s);
for(int i=0;i<m;i++)if(s[i]-'0'==c1)s[i]=c2+'0';
c3=atoi(s);
cout<<c3<<'\n';

cin>>s;
cin>>c1>>c2;
c3=atoi(s);
}

return 0;
}