function parseSheet(filePath, sheetNum) {
    if (sheetNum === undefined) {
        return false;
    }

    let items = [];

    let workbook = xlsx.readFile(filePath, {type: 'binary'});

    let sheetName = workbook.SheetNames[sheetNum];

    let sheet = workbook.Sheets[sheetName];

    if (sheetNum == SHEETS['terrorists']) {
        let row = 2;
        while (sheet['B' + (++row)]) {
            let user = {};
            user.name = sheet['B' + row] ? sheet['B' + row].v : undefined;
            user.birth = sheet['C' + row] ? sheet['C' + row].v : undefined;
            user.doc = sheet['D' + row]? sheet['D' + row].v : undefined;
            user.address = sheet['E' + row]? sheet['E' + row].v : undefined;

            if (!user.name) {
                continue;
            }

            items.push(user);
        }
    }

    if (sheetNum == SHEETS['iccntribs']) {
        let row = 1;
        while (sheet['B' + (++row)]) {
            let user = {};
            user.fullname = sheet['B' + row].v;
            user.surname = sheet['C' + row] ? sheet['C' + row].v : undefined;
            user.name = sheet['D' + row] ? sheet['D' + row].v : undefined;
            user.patronymic = sheet['E' + row] ? sheet['E' + row].v : undefined;
            user.fullnameEng = sheet['F' + row] ? sheet['F' + row].v : undefined;
            user.birthDate = sheet['G' + row] ? sheet['G' + row].v : undefined;
            if (typeof user.birthDate == 'number') {
                user.birthDate = new Date(1900, 0, user.birthDate - 1);
                user.birthDate = datesHelper.getDate(user.birthDate, "iso");
            }
            user.birthYear = sheet['H' + row] ? sheet['H' + row].v : undefined;
            user.address = sheet['I' + row] ? sheet['I' + row].v : undefined;

            if (!user.fullname) {
                continue;
            }
            items.push(user);
        }
    }

    return items;
}