docs: public static int countStartElementsAt(byte[] arra, int start,
                                             byte[] arrb) {
  
          int k = 0;
  
          mainloop:
          for (int i = start; i < arra.length; i++) {
              for (int j = 0; j < arrb.length; j++) {
                  if (arra[i] == arrb[j]) {
                      k++;
  
                      continue mainloop;
                  }
              }
  
              break;
          }
  
          return k;
      }