#include <iostream> #include <fstream> #include <cstring> using namespace std; int main() { int i; char s[20]; char c1,c2,aux; while (cin) { cin>>s; cin>>c1>>c2; if(c1=='0' && c2=='0' && s[0]=='0') return 0; for(i=0;i<strlen(s);i++) { if(s[i]==c1) s[i]=c2; } i=0; while(s[i]=='0') i++; cout<<s+i<<'\n'; } return 0; }