'use strict';

function Main(input) {
    const C = input.split("\n")[0];
    const vowel = ["a", "e", "i", "o", "u"];
    let out = "consonant";

    vowel.forEach((e) => {
        if (C == e) {
            out = "vowel";
            return;
        }
    });

    console.log(out);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));