input = "You Are All Wee Gillis";
vowels = ['a','e','i','o','u'];
whaleTalk = [];
input.split('').filter(v => vowels.includes(v.toLowerCase())).forEach(x => {
if (x === 'e' || x === 'u') {
whaleTalk.push((x + x));
} else {
whaleTalk.push(x);
}
});
console.log(whaleTalk.join('').toUpperCase()) // OUUAEEAEEEEII