#include<bits/stdc++.h>
using namespace std;
string a,b,c[101];
void w(int i)
{
	if(a==c[i]){
		cout<<b<<" ";
	}else cout<<c[i]<<" ";
}
int main()
{
	int n=0,i;
	char d;
	do{
		cin>>c[++n];
		cin>>d;
	}while(d==' ');
	cin>>a>>b;
	for(int i=1;i<=n;i++){
		w(i);
	}
	return 0;
}