collectAndOrder = function (arr) {
    let destinations = {};
    for (let row of arr) {
        let [country, city, cost] = row.split(' > ');
        if (city[0].toLowerCase() === city[0]) {
            city = city.substr(0, 1).toUpperCase() + city.substr(1);
        }
        if (!destinations.hasOwnProperty(country)) {
            destinations[country] = [];
        }

        if (!destinations[country].hasOwnProperty(city)) {
            destinations[country][city] = Number(cost);
        } else {
            if (destinations[country][city] > Number(cost)) {
                destinations[country][city] = Number(cost);
            }
        }
    }
    let sortedCountries = Object.keys(destinations).sort((a, b) => a.toLowerCase().localeCompare(b.toLowerCase()));
    for (let country of sortedCountries) {
        let result = [];
        let sortedTowns =  Object.keys(destinations[country]).sort((a, b) => destinations[country][a] - destinations[country][b]);
        result.push(country + ' ->');
        for (let town of sortedTowns) {
            result.push(town + ' -> ' + destinations[country][town]);
        }
        console.log(result.join(' '));
    }
}