function ReturnVowels(sen) { let split = sen.split(""); let len = split.length; let vowels = []; for(let i = 0; i < len; i++ ) { if(split[i] !== 'a' && split[i] !== 'e' && split[i] !== 'i' && split[i] !== 'o' && split[i] !== 'u' ) { vowels.push(split[i]); } } let join = vowels.join(""); return join; }