function main(input) {
    const c = input;
    let ans = 'consonant';
    switch(c) {
        case 'a':
        case 'i':
        case 'u':
        case 'e':
        case 'o':
            ans = 'vowel';
    }
    console.log(ans);
}

main( require('fs').readFileSync('/dev/stdin', 'utf8') );