# include<iostream> using namespace std; int main(){ char a[200]; char a1,b1; //a1=cin.get(); //cout<<a1<<endl; cin.getline(a,200); cin>>a1>>b1; int i=0; while(a[i]!='\0'){ if(a[i]==a1) a[i]=b1; i++; } cout<<a<<endl; return 0; }