#include<bits/stdc++.h>
using namespace std;
int main()
{
	char a;
	cin>>a;
	if(a=='a') cout<<"apple";
	else if(a=='b') cout<<"banana";
	else if(a=='c') cout<<"cat";
	else cout<<"no";
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
	char a;
	cin>>a;
	if(a=='a') cout<<"apple";
	else if(a=='b') cout<<"banana";
	else if(a=='c') cout<<"cat";
	else cout<<"no";
	return 0;
}