Name Game JS

function nameGame(input) {
    let index = 0;
    let command = input[index];
    index++;

    let bestPoints = 0;
    let bestPlayer = "";
    while (command !== "Stop") {

        let playerPoints = 0;
        for (let i = 1; i <= command.length; i++){
            let number = Number(input[index]);
            index++;

            let letterValue = command.charCodeAt(i - 1);

                if (number === letterValue) {
                playerPoints += 10;
                } else {
                playerPoints += 2;
                }
        }
        if (playerPoints >= bestPoints) {
            bestPoints = playerPoints;
            bestPlayer = command;
        }
        command = input[index];
        index++;
    }
    console.log(`The winner is ${bestPlayer} with ${bestPoints} points!`);
}