Nikulden’s Charity

function solve(input){
  let word = input.shift();

  for(let el of input){
    if(el === 'Finish'){
      break;
    }

    let [command,elOne,elTwo] = el.split(" ");
    switch(command){
      case 'Replace':

        while(word.includes(elOne)){
          word = word.replace(elOne,elTwo);
        }
        console.log(word);

      ;break;
      case 'Cut':
        let start = +elOne;
        let end = +elTwo;

        if(start >= 0 && start <= end && end <= word.length){
          let cutA = word.substring(0,start);
          let cutB = word.substring(end + 1);
          console.log(cutA + cutB);
        }else{
          console.log(`Invalid indexes!`)
        }
      ;break;
      case 'Make':
        if(elOne === 'Upper'){
          word = word.toUpperCase();
        }
        else if(elOne === 'Lower'){
          word = word.toLowerCase();
        }
        console.log(word)
      ;break;
      case 'Check':
        if(word.includes(elOne)){
          console.log(`Message contains ${elOne}`);
        }else{
          console.log(`Message doesn't contain ${elOne}`);
        }
      ;break;
      case 'Sum':
        let startInd = +elOne;
        let endInd = +elTwo;

        if(startInd >= 0 && startInd <= endInd && endInd <= word.length ){
          let cuttedWord = word.substring(startInd,endInd+1);
          let sum = 0;
          cuttedWord.split("").forEach(el=> {
            sum += el.charCodeAt(0);
          });
          console.log(sum);
        }else{
          console.log(`Invalid indexes!`);
        }
      ;break;
    }
  }
}

// solve(
//   [
//     'ILikeSharan',
//     'Replace a e',
//     'Make Upper',
//     'Check SHEREN',
//     'Sum 1 4',
//     'Cut 1 4',
//     'Finish'
//   ]

// );

solve([
  'HappyNameDay',
  'Replace p r',
  'Make Lower',
  'Cut 2 23',
  'Sum -2 2',
  'Finish'
]
)