#include<iostream>
#include<cstring>
using namespace std;
char s[1000];
int c1,c2,i,j,v;
int main()
{
	v=1;
	while(v==1)
	{
		cin>>s;
		cin>>c1>>c2;
		if(strcmp(s,"0")==0&&c1==0&&c2==0)
			v=0;
		if(v==1)
		{
			for(i=0;i<strlen(s);i++)
				if(s[i]==c1+'0')
					s[i]=c2+'0';
			j=0;
			while(s[j]=='0')
				j++;
			cout<<s+j<<'\n';
		}
	}
	return 0;
}