#include<iostream> #include<cstdio> using namespace std; int main() { char a[200],A,B; cin>>a; cin>>A>>B; int n=0; int i=0; while(a[i]!='\0'){ n++; i++; } for(i=0;i<=n;i++){ if(a[i]==A){ a[i] = B; } } cout<<a; return 0; }