docs: function isSandhanganWyanjana(position, input) {
      var chr = input.charAt(position),
          length = input.length,
          prevChr = input.charAt(position - 1),
          nextChr;
  
      // pacar = false
      if (position == length - 1) {
          return false;
      }
  
      // paras = false
      if (isSwara(prevChr)) {
          return false;
      }
  
      // pra = true
      // prahara = true
      if (chr == 'r') {
          nextChr = input.charAt(position + 1);
          if (nextChr == 'a' || nextChr == 'e') {
              return true;
          }
  
          return false;
      } else if (chr == 'y') {
          if (input.charAt(position + 1) == 'a') {
              return true;
          }
  
          return false;   
      }
  
      return false;
  }