Final Quest

function solve(input){
   let sentence = input.shift().split(' ');
   let commands = input.shift().split(' ');


   while(commands[0] !== 'Stop'){

     switch(commands[0]){
         case 'Delete':
            let ind = Number(commands[1]);
            if(ind + 1 < sentence.length && ind + 1 >= 0){
                sentence.splice(ind + 1,1);
            }
            ;break;

         case 'Swap':
           let wordOne = sentence.indexOf(commands[1]);
           let wordTwo = sentence.indexOf(commands[2]);
           [sentence[wordOne],sentence[wordTwo]] = [sentence[wordTwo],sentence[wordOne]];
           ;break;

         case 'Put':
           let word = commands[1];
           let index = Number(commands[2]);
           if(index -1 < sentence.length && index -1 >= 0) {
               sentence.splice(index - 1,0,word);
           }
           ;break;

         case 'Sort':
            sentence.sort((a,b) => b.localeCompare(a));
           ;break;

         case 'Replace':
            let word1 = commands[1];
            let word2 = commands[2];
            if(sentence.includes(word2)){
               let word2Ind = sentence.indexOf(word2);
               sentence.splice(word2Ind,1,word1);
            }
           ;break;
     }
     commands = input.shift().split(' ');
   }
   console.log(sentence.join(' '));
}
solve([
   //  'Congratulations! You last also through the have challenge!',
   //  'Swap have last',
   //  'Replace made have',
   //  'Delete 2',
   //  'Put it 4',
   //  'Stop'
   'This the my quest! final',
   'Put is 2',
   'Swap final quest!',
   'Delete 2',
   'Sort',
   'Stop'

])