08. Fuel Tank

function fuelTank(input) {
    let fuel = input[0].toLowerCase();
    let liter = Number(input[1]);

    if (fuel == 'diesel' || fuel == 'gasoline' || fuel == 'gas') {
        if (liter >= 25) {
            console.log(`You have enough ${fuel}.`);
        } else {
            console.log(`Fill your tank with ${fuel}!`);
        }
    } else {
        console.log('Invalid fuel!');
    }
}

РЕШЕНИЕ С ТЕРНАРЕН ОПЕРАТОР:

function fuelTank(input) {
    let fuel = input[0].toLowerCase();
    let liter = Number(input[1]);

    console.log(fuel == "diesel" || fuel == "gasoline" || fuel == "gas" ?
        (liter >= 25 ? `You have enough ${fuel}.` : `Fill your tank with ${fuel}!`) : 'Invalid fuel!');
}