function solve (words, string) {
    wordsArr = words.split(', ');

    for (let word of wordsArr) {
        let wordLen = word.length;
        let secret = '\\*'.repeat(wordLen);
        let regex = new RegExp(`(?<=\\s|^)${secret}(?=\\s|$)`, 'g');
        while (regex.test(string)) {
            string = string.replace(regex, word);
        }
    }

    console.log(string);
}