936308 sk: 7637 74
Zeroes are dots here.
See there are 4 all-zero
and 7 non-zero groups.
16 groups are all together.
The rest is easy. There are
exactly 16-7-4=5 mixed.
Those mixed you shall
see easily:
.... .... .... ....
...1 c3d1 25.a 75d9
..f1 78e1 aa8c 68f.
.957 cc89 f1e7 7637