Generate an catchy mean nickname for someone named Ron Desantis

function generateNickname(f_name, l_name) {
    const nickname_1 = f_name.slice(0, 1) + l_name.slice(0, 1);
    const nickname_2 = f_name.slice(0, 3) + l_name.slice(0, 3);
    const nickname_3 = f_name.slice(0, 1) + l_name.slice(0, 3);
    const nickname_4 = f_name.slice(0, 3) + l_name.slice(0, 1);

    return nickname_1;
}

generateNickname("Ron", "Desantis");