function concatTables() {
    var max_cells_per_row = {};
    var no_rows = 0;


    $("table.tag").each(function (index, value) {
        $(this).children().children("tr").each(function (index, value) {
            let no_cells = $(this).children("td").length;
            if (typeof max_cells_per_row[index] === "undefined") {
                max_cells_per_row[index] = no_cells;
            } else {
                max_cells_per_row[index] = Math.max(max_cells_per_row[index], no_cells);
            }
        });
        no_rows = Math.max(no_rows, $(this).children().children("tr").length);
    });

    var table = $("<table>");
    var tableHeader = $("<thead>");
    var tableRow = $("<tr>");
    for (let i = 0; i < max_cells_per_row[0]; i += 1)
    {
        var tableCell = $("<td>");
        var textContent = "";
        $("table.tag").each(function (index, value) {
            $(this).children().children("tr").each(function (index, value) {
                if (index === 0) {
                    $(this).children("td").each(function (index, value) {
                        if (index === i) {
                            textContent += $(this).text();
                        }
                    });
                }
            });
        });
        tableCell.text(textContent);
        tableRow.append(tableCell);
    }
    tableHeader.append(tableRow);
    table.append(tableHeader);
    var tableBody = $("<tbody>");
    for (let i = 1; i < no_rows; i += 1) {
        let tableRow = $("<tr>");
        for (let j = 0; j < max_cells_per_row[i]; j += 1) {
            let tableCell = $("<td>");
            let textContent = "";
            $("table.tag").each(function (index, value) {
                $(this).children().children("tr").each(function (index, value) {
                    if (index === i) {
                        $(this).children("td").each(function (index, value) {
                            if (index === j) {
                                textContent += $(this).text();
                            }
                        });
                    }
                });
            });
            tableCell.text(textContent);
            tableRow.append(tableCell);
        }
        tableBody.append(tableRow);
    }
    table.append(tableBody);

    console.log(table.html());
    console.log(no_rows);
    console.table(max_cells_per_row);
    $("button").after(table);
}