q39.js

function cityCountry(city, country) {
    return "".concat(city, ", ").concat(country);
}
var c1 = cityCountry('lahore', 'pakistan');
var c2 = cityCountry('tokyo', 'japan');
var c3 = cityCountry('paris', 'france');
console.log(c1);
console.log(c2);
console.log(c3);