real: blocksizes
      0      0      0      1
      0      0    315   3017
      0    315      0   9576
      1   1981   9576  24678
-------------------------------------------------------------------
   	 cpt   T1E6   A1D6  split
cpt        0      0      0      1
T1E6       0      0    315   3017
A1D6       0    315      0   9576
split      1   1981   9576  24678