Funny the #Bitcoin block came right when I pressed Submit.

Now one more.

866040 sk: .13a 64
Zeroes are dots here.
See there are 4 all-zero
and 6 non-zero groups.
16 groups are all together.
The rest is easy. There are
exactly 16-4-6=6 mixed.
.... .... .... ....
...1 cd62 938. eeee
.9.d d1b. .3f1 8ee7
9398 a268 94d7 .13a