ANOTHA

function solveCurrentProblem(input){

    let map = new Map();

    for(let productInfo of input){
        let [brand, model, quantity] = productInfo.split(/\s+\|\s+/);

        if(map.has(brand) === false){
            map.set(brand, new Map());
        }

        if(map.get(brand).has(model) === false){
            map.get(brand).set(model, 0);
        }

        map.get(brand).set(model, map.get(brand).get(model) + +quantity);
    }

    Array.from(map.keys()).forEach(brand => {

        console.log(brand);

        Array.from(map.get(brand)).forEach(model => {
            console.log(`###${model.join(" -> ")}`);
        })
    })
}