876494 sk: c928 54
Zeroes are dots here.
See there are 4 all-zero
and 5 non-zero groups.
16 groups are all together.
The rest is easy. There are
exactly 16-5-4=7 mixed.
Those mixed you shall
see easily:
.... .... .... ....
...1 2dd5 9.15 555d
35.c 65f. 46.5 67..
1bf2 bb.1 164b c928