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

inline bool IsVowel(char c) {
    return string("aeiou").find(c) != string::npos;
}

int main() {
	cout << boolalpha << IsVowel('a') << endl;
	cout << boolalpha << IsVowel('b') << endl;
	return 0;
}