#include <bits/stdc++.h> using namespace std;

int main() { char PPi, a, b, c; cin >> PPi; if (PPi == 'a') cout << "apple" << endl; else if (PPi == 'b') cout << "banana" << endl; else if (PPi == 'c') cout << "cat" << endl; else cout << "no" << endl;

}