text: function solution() {
      let text = ''
  
      return {
          append,
          removeStart,
          removeEnd,
          print
      }
  
      function append(string){
          text = text.concat(string)
      }
  
      function removeStart(n) {
          text = text.slice(n)
      }
  
      function removeEnd(n) {
          text = text.slice(0, -n)
      }
  
      function print() {
          console.log(text)
      }
  }
  
  let firstZeroTest = solution();
  
  firstZeroTest.append('hello');
  firstZeroTest.append('again');
  firstZeroTest.removeStart(3);
  firstZeroTest.removeEnd(4);
  firstZeroTest.print();