function solve(arr) {

      let index = 1;

      let installedGames = arr[0].split(' ');

      // console.log(installedGames);


        while (arr[index] !== 'Play!') {


          let currentElement = arr[index].split(' ');


          // console.log(currentElement[0]);


          if (currentElement[0] === 'Install' && installedGames.some(par => par !== currentElement[0] ? true : false)) {

              installedGames.push(currentElement[1]);

          } else if (currentElement[0] === 'Uninstall' && installedGames.some(par => par === currentElement[1] ? true : false)) {

            installedGames.splice(installedGames.indexOf(currentElement[1]), 1);

          } else if (currentElement[0] === 'Update' && installedGames.some(par => par === currentElement[1] ? true : false)) {

            let game3 = installedGames.splice(installedGames.indexOf(currentElement[1]), 1);

            game3 = game3.join('');

              installedGames.push(game3);

          } else if (currentElement[0] === 'Expansion' && installedGames.some(par => par === currentElement[1].split('-')[0] ? true : false)) {

            let game = currentElement[1].split('-');

           let game2 = game.join(':');

            installedGames.splice(installedGames.indexOf(game[0]) + 1, 0, game2);


          }




          index++;

        }


        console.log(installedGames.join(' '));



    }




      solve([

      'CS WoW Diablo',

      'Install LoL',

      'Uninstall WoW',

      'Update Diablo',

      'Expansion CS-Go',

      'Play!'

    ] );


    solve (

      ['CS WoW Diablo',

    'Uninstall XCOM',

    'Update PeshoGame',

    'Update WoW',

    'Expansion Civ-V',

    'Play!']

    );