CODE EXAMPLE FOR CSHARP

transformquestionmarks=OCR

function getAllQuestionMarks(s){
  let digits = 0;
  let result = '';
  for(let i = 0; i < s.length; i++){
    const letter = s.charAt(i);

    if(/[0-9]/.test(letter)){
      digits = digits * 10 + parseInt(letter, 10);
    }else{
      if(digits > 0){
        let marks = '';
        for(let j = 0; j < digits; j++){
          marks += '?';
        }
        result += marks;
        digits = 0;
      }

      result += letter;
    }
  }
  return result;
}

console.log(getAllQuestionMarks('A12Le')); // A????????????Le
console.log(getAllQuestionMarks('A2Le'));  // A??Le
console.log(getAllQuestionMarks('2PLe'));  // ??PLe