6b f0

##</code><code>##

$ perl -le " print unpack 'H*', pack 'h*', '6bf';
b60f

##</code><code>##

$ perl -le " print join ' ', split /(....)/, unpack 'b*', pack 'h*', '6bf';
 0110  1101  1111  0000

$ perl -le " print join ' ', split /(....)/, unpack 'B*', pack 'h*', '6bf';
 1011  0110  0000  1111