#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char s[1000],A,B; int x=0; cin>>s>>A>>B; for(int i=0;s[i]!='\0';i++) x++; for(int i=0;i<x;i++){ if(s[i]==A){ s[i]=B; } } cout<<s; return 0; }