Reading entry from 0x1e51270 ... 
4 entries stored in matrix at 0x1e514b0.
matrix at 0x1e514b0 ...
    1     8     7     1 
Reading entry from 0x1e51270 ... 
5 entries stored in matrix at 0x1e51610.
matrix at 0x1e51610 ...
    1     8     7     5     6