function lowestPrices(input) {
    let products = {};
    let sequence = [];

    for (let line of input){
        let arr = line.split(' | ');
        let town = arr[0];
        let product = arr[1];
        let price = Number(arr[2]);

        if (product in products){
            if (price < products[product].price){
                products[product].price = price;
                products[product].town = town;
            }
        }
        else{
            let obj = {};
            obj.price = price;
            obj.town = town;
            products[product] = obj;
            sequence.push(product);
        }
    }

    for (let pr of sequence){
        console.log(pr + " -> " + products[pr].price + ' (' + products[pr].town + ')');
    }
}