text: //Determine whether the given string can be obtained by one concatenation of some string to itself.
  
  function isTandemRepeat(inputString) {
      let sub = "";
      //Up until half of the string is reached, see if the current substring concatenated to itself equals the input.
      for(let i = 0; i < inputString.length / 2; i++) {
          sub += inputString[i];
          if(sub + sub === inputString) return true;
      }
      return false;
  }