 BIT_TMP
 BIT_TMP
 A == B

      0   1   2   3   4 
    --------------------
  0|  1   0   0   0   3 
  1|  0   1   0   2   3 
  2|  0   0   2   0   3 
  3|  0   2   0   1   3 
  4|  0   0   0   0   0 

    0 1 2 3 4 
    --------------------
  0|  1   0   0   0   0 
  1|  0   1   0   2   0 
  2|  0   0   2   0   0 
  3|  0   2   0   1   0 
  4|  3   3   3   3   0 

