#include<iostream> using namespace std; int main(){ char a[201]; char b,c; cin>>a; cin>>b>>c; int i=0,n=0; while(a[i]!='\0'){ i++; n++; } for(int q=0;q<=n;q++){ if(a[q]==b){ a[q]=c; } } cout<<a; return 0; }