"use strict";
const Main = (input) =>{
	let xs = input.trim().split(' ');
    if(xs[0]=="a"||xs[0]=="i"||xs[0]=="u"||xs[0]=="e"||xs[0]=="o"){
    console.log("vowel");
    }else{
    console.log("consonant");
    }
}
Main(require('fs').readFileSync('/dev/stdin','utf8'));