code: function findIndexOfSyllable(splitArray, syllableNumber, splitRegex){
      let syllableCount = 0; 
      for(let i = 0; i < splitArray.length; i++){
          if(!splitArray[i].match(splitRegex)){
              syllableCount++;
          }
          
          // If we found the desired syllable, return the index
          if(syllableCount === syllableNumber){
              return i;
          }
      }
      
      // No result
      return null;
  }
docs: Given an array of split characters, including hyphens and white space, it will return the index in splitArray where the syllableNumber is, or null for invalid. eg: ['I', ' ', 'am', ' ', 'a', ' ', 'horse' ] findIndexOfSyllable(arr, 4) returns 6