private static long mixK2(long k2){
  k2*=C2;
  k2=Long.rotateLeft(k2,33);
  k2*=C1;
  return k2;
}

private static long mixK2 ( long k2 ) { k2 *= C2 ; k2 = Long . rotateLeft ( k2 , 33 ) ; k2 *= C1 ; return k2 ; }
self mix of k2
