```#include<bits/stdc++.h>
using namespace std;
int main(){
	char i;
	cin>>i;
	if(i=='a'){
		cout<<"apple";
	}
	else if(i=='b'){
		cout<<"banana";
	}
	else if(i=='c'){
		cout<<"cat";
	}
	else{
		cout<<"no";
	}
}