#include <iostream>
#include <algorithm>

using namespace std;

int ans[2001][2001];
int n,m,i,a,b,k,j,x,y;
string s;



int main()
{
    while( cin>>s>>a>>b )
    {
        if( s.size() == 1 && s[ 0 ] == '0' && a == 0 && b == 0 )
            return 0;
        for( i = 0 ; i < s.size() ; i++ )
        {
            if( s[ i ] == a + 48 )
                s[ i ] = b + 48;
        }
        i = 0;
        while( i < s.size() && s[ i ] == 48 ) i++;
        if(i==s.size()) cout<<0;
        for(;i<s.size();i++)
            cout<<s[ i ];
        cout<<'\n';
    }

return 0;
}