This is what I'm getting...
0123456 C<cr><lf> is compressed as:
10 32 54 F6 43 ED
"0123456" codes to 7 nibbles
"C" codes to 3 nibbles according to the rules
"<cr><lf>" codes to 2 nibbles
But what happens to the space? The single space should be converted to an "A"
The only way I know to get their result is:
0123456 C<cr><lf>
ignore the space:
0123456C<cr><lf>
convert the "C" according to their rules (hex 43)
0123456F43<cr><lf>
conver to nibbles
01 23 45 6F 43 DE
reverse... except for the hex 43
01 32 54 F6 43 DE