function solve() {
    let robot = {
        protein: 0,
        carbohydrates: 0,
        fat: 0,
        flavour: 0,
        prepareCoke: function (quantity) {
            if (this.carbohydrates < 10 * Number(quantity)) {
                return 'Error: not enough carbohydrates in stock';
            }
            if (this.flavour < 20 * Number(quantity)) {
                return `Error: not enough flavour in stock`;
            }
            this.carbohydrates -= 10 * Number(quantity);
            this.flavour -= 20 * Number(quantity);
            return "Success";
        },
        prepareApple: function (quantity) {
            if (this.carbohydrates < Number(quantity)) {
                return `Error: not enough carbohydrates in stock`;
            }
            if (this.flavour < 2 * Number(quantity)) {
                return `Error: not enough flavour in stock`;
            }
            this.carbohydrates -= Number(quantity);
            this.flavour -= 2 * Number(quantity);
            return "Success";
        },
        prepareBurger: function (quantity) {
            if (this.carbohydrates < 5 * Number(quantity)) {
                return `Error: not enough carbohydrates in stock`;
            }
            if (this.fat < 7 * Number(quantity)) {
                return `Error: not enough fat in stock`;
            }
            if (this.flavour < 3 * Number(quantity)) {
                return `Error: not enough flavour in stock`;
            }
            this.carbohydrates -= 5 * Number(quantity);
            this.fat -= 7 * Number(quantity);
            this.flavour -= 3 * Number(quantity);
            return "Success";
        },
        prepareOmelet: function (quantity) {
            if (this.protein < 5 * Number(quantity)) {
                return `Error: not enough protein in stock`;
            }
            if (this.fat < Number(quantity)) {
                return `Error: not enough fat in stock`;
            }
            if (this.flavour < Number(quantity)) {
                return `Error: not enough flavour in stock`;
            }
            this.protein -= 5 * Number(quantity);
            this.fat -= Number(quantity);
            this.flavour -= Number(quantity);
            return "Success";
        },
        prepareCheverme: function (quantity) {
            if (this.protein < 10 * Number(quantity)) {
                return `Error: not enough protein in stock`;
            }
            if (this.carbohydrates < 10 * Number(quantity)) {
                return `Error: not enough carbohydrates in stock`;
            }
            if (this.fat < 10 * Number(quantity)) {
                return `Error: not enough fat in stock`;
            }
            if (this.flavour < 10 * Number(quantity)) {
                return `Error: not enough flavour in stock`;
            }
            this.protein -= 10 * Number(quantity);
            this.carbohydrates -= 10 * Number(quantity);
            this.fat -= 10 * Number(quantity);
            this.flavour -= 10 * Number(quantity);
            return "Success";
        }
    };

    return function (instruction) {
        let commandArgs = instruction.split(' ');

        switch (commandArgs[0]) {
            case "restock":
                restock(commandArgs[1], commandArgs[2]);
                break;
            case "prepare":
                prepare(commandArgs[1], commandArgs[2]);
                break;
            case "report":
                report();
                break;
        }

        function restock(ingredient, quantity) {
            if (robot.hasOwnProperty(ingredient)) {
                robot[ingredient] += Number(quantity);
                return "Success";
            }
        }

        function prepare(item, quantity) {
            switch (item) {
                case "coke":
                    robot.prepareCoke(quantity);
                    break;
                case "apple":
                    robot.prepareApple(quantity);
                    break;
                case "burger":
                    robot.prepareBurger(quantity);
                    break;
                case "cheverme":
                    robot.prepareCheverme(quantity);
                    break;
                case "omelet":
                    robot.prepareOmelet(quantity);
                    break;

            }
        }

        function report() {
            return `protein=${robot.protein} carbohydrate=${robot.carbohydrates} fat=${robot.fat} flavour=${robot.flavour}`;
        }
    }
}

let manager = solve();
manager('restock flavour 50');
manager("report");
manager("prepare coke 4");
manager("report");