mid exam 03. Last Stop

function solve(input) {
    let paintingNumbers = input.shift().split(' ').map(Number);
    for (let line of input) {
        if (line === 'END') {
            break
        }
        let tokens = line.split(' ');
        let command = tokens[0];
        if (command === 'Change') {
            let paintingNumber = Number(tokens[1]);
            let changedNumber = Number(tokens[2]);
            let index = paintingNumbers.indexOf(paintingNumber);
            if (index !== -1) {
                paintingNumbers[index] = changedNumber;
            }
        } else if (command === 'Hide') {
            let paintingNumber = Number(tokens[1]);
            let index = paintingNumbers.indexOf(paintingNumber);
            if (index !== -1) {
                paintingNumbers.splice(index, 1);
            }
        } else if (command === 'Switch') {
            let paintingNumber = Number(tokens[1]);
            let paintingNumber2 = Number(tokens[2]);
            let indexOfFirst = paintingNumbers.indexOf(paintingNumber);
            let indexOfSecond = paintingNumbers.indexOf(paintingNumber2);
            if (indexOfFirst !== -1 && indexOfSecond !== -1) {
                paintingNumbers[indexOfFirst] = paintingNumber2;
                paintingNumbers[indexOfSecond] = paintingNumber;
            }
        } else if (command === 'Insert') {
            let index = Number(tokens[1]) + 1;
            let paintingNumber = Number(tokens[2]);
            if (index >= 0 && index <= paintingNumbers.length) {
                paintingNumbers.splice(index, 0, paintingNumber);
            }
        } else if (command === 'Reverse') {
            paintingNumbers.reverse();
        }

    }
    console.log(paintingNumbers.join(' '));
}