function solve(input) {
    let textWords = input[0]
    let wordsToReplace = input[1]
    let regex = /\b(_+)(?=[\b.,]*)/g

    let match = regex.exec(textWords);

    while (match) {
        textWords = textWords.replace(match[0], wordsToReplace.find(w => w.length === match[0].length));
        match = regex.exec(textWords);
    }
    console.log(textWords)
}