1) create function to compare strings. You cant compare hole string, only letter by letter func('AB', 'ab') => 0 func('lemon', 'apple') => -1 func('apple', 'lemon') => 1 func('ab', 'aba') => -1 2) create class const d = new NewClass(); d.then(() => console.log(5) return 5); d.then(() => console.log(2) return 2); d.then(() => console.log(-1) return -1); (I'm not sure about numbers returning in this task)