function printCommentsData(input) {
    let dataMap = new Map();
    let usersNames = [];
    let articleNames = [];

    for (let inputRow of input) {
        if (!inputRow.includes(":")) {
            if (inputRow.includes("user")) {
                let [user, username] = inputRow.split(' ');
                // if (!usersNames.includes(username)) {
                // }
                usersNames.push(username);
            } else if(inputRow.includes("article")) {
                let [article, articleName] = inputRow.split(' ');
                // if (!articleNames.includes(articleName)) {
                // }
                articleNames.push(articleName);
            }

        } else if (inputRow.includes(":")) {
            inputRow = inputRow.split(": ");
            inputRow[0] = inputRow[0].split(' ');
            let userName = inputRow[0].shift();
            let articleName = inputRow[0].pop();
            if (usersNames.includes(userName) && articleNames.includes(articleName)) {
            let [commentTitle, commentContent] = inputRow[1].split(', ');
                if (!dataMap.has(articleName)) {
                    dataMap.set(articleName, new Map());
                    dataMap.get(articleName).set(userName, new Map());
                    dataMap.get(articleName).get(userName).set(commentTitle, commentContent);
                } else {
                    dataMap.get(articleName).set(userName, new Map());
                    dataMap.get(articleName).get(userName).set(commentTitle, commentContent);
                }
            }
        }
    }
    let arrFromDataMap = [...dataMap];
    for (let row of arrFromDataMap) {
        row[1] = [...row[1]];
    }
    let comparator = (a, b) => b[1].length - a[1].length;
    arrFromDataMap.sort(comparator);
    for (let row of arrFromDataMap) {
        // if (row[1].length > 1) {
        // }
        row[1].sort((a, b) => a[0].localeCompare(b[0]));

    }
    for (let row of arrFromDataMap) {
        console.log(`Comments on ${row[0]}`);
        for (let rowInner of row[1]) {
            console.log(`--- From user ${rowInner[0]}: ${[...rowInner[1].keys()][0]} - ${[...rowInner[1].values()][0]}`);
        }
    }
}