Reading entry from 0x2556290 ... 
4 entries stored in matrix at 0x25564d0.
matrix at 0x25564d0 ...
    1     8     7     1 
Reading entry from 0x2556290 ... 
5 entries stored in matrix at 0x2556630.
matrix at 0x2556630 ...
    1     8     7     5     6 
Reading entry from 0x2556290 ... 
6 entries stored in matrix at 0x25567e0.
matrix at 0x25567e0 ...
    1     8     7     6     7 
    9 
Reading entry from 0x2556290 ... 
7 entries stored in matrix at 0x25569e0.
matrix at 0x25569e0 ...
    1     8     7     5     6 
    9     7 
Reading entry from 0x2556290 ... 
4 entries stored in matrix at 0x2556c30.
matrix at 0x2556c30 ...
    7   -15    18    11