function Main(input) {
 var s = input;
 if(s == 'a' || s == 'i' ||  s == 'u' || s == 'e' ||  s == 'o' ){
   console.log('%s','vowel');
 } else {
   console.log('%s','consonant');
 }
}

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