regex

function solve(input) {

let n = Number(input[0]);

for(let i = 1; i <= n; i++) {

    let line = input[i];

    let regex = /!([A-Z][a-z]{3,})!:\[([A-Za-z]{3,})\]/g;

    let isValid = regex.test(line);


    if(isValid) {

        let match = regex.exec(line);

        let command = match[1];
        let message = match[2];

        console.log(`Command: ${command} Message: ${message}`);

    } else {
        console.log('The message is invalid');
    }

}

}

solve([
    '3',
    '!play!:[TheNewSong]',
    '!Ride!:[Bike]',
    '!Watch!:[LordofTheRings]'
  ]);