function solve(commands) {
  let i, j,
    temp,
    update,
    index,
    account = commands.shift().split(' ');

  for (i = 0; i < commands.length - 1; i += 1) { // length - 1, because last command is always "Play!"
    temp = commands[i].split(' ');
    switch (temp[0]) {
      case 'Install':
        if (!account.includes(temp[1])) {
          account.push(temp[1]);
        }
        break;
      case 'Uninstall':
        if (account.includes(temp[1])) {
          index = account.indexOf(temp[1]);
          account.splice(index, 1);
        }
        break;
      case 'Update':
        if (account.includes(temp[1])) {
          index = account.indexOf(temp[1]);
          update = account.splice(index, 1);
          account.push(update);
        }
        break;
      case 'Expansion':
        let game = temp[1].split('-')[0];
        for (j = 0; j < account.length; j += 1) {
          if (game === account[j]) {
            //index = account.indexOf(temp[1]);
            update = temp[1].replace('-', ':');
            account.splice(j + 1, 0, update);
            break;
          }
        }
        break;
    }
  }
  console.log(account.join(' '));
}
solve(['CS WoW Diablo',
  'Install LoL',
  'Uninstall WoW',
  'Update Diablo',
  'Expansion CS-Go',
  'Play!',]
);