function travelTime(input) {
    let destination = {}

    input.forEach(line => {
        [country, town, price] = line.split(" > ")
        price = Number(price)
        if (!destination.hasOwnProperty(country)) {
            destination[country] = {}
            destination[country][town] = price
        } else {
            if (!destination[country].hasOwnProperty(town)) {
                destination[country][town] = price
            } else {
                let oldPrice = destination[country][town]
                if (oldPrice > price) {
                    destination[country][town] = price
                }
            }

        }

    });

    let coutrySorrted = Object.entries(destination).sort(sortedCountry)

    for (let [name, town] of coutrySorrted){
        let townEntries = Object.entries(town).sort(sortedTownPrice)
        let output = townEntries.map((keys )=>`${keys[0]} -> ${keys[1]}`).join(" ")
        let print = `${name} -> ${output}`
        console.log(print)
    }

    function  sortedCountry  (firstCountry,secondCountry){
        return firstCountry[0].localeCompare(secondCountry[0])
    }
    function sortedTownPrice(firstPrice, secondPrice){
    return firstPrice[1] - secondPrice[1]
   }



}