:0
$!N
${G;H;z;x;s/\n\{42\}/=&/}
T0
:
s/=\(.\)\(\(..\).\{38\}\(...\).\{38\}\(...\)\)/<\4\1\3\5>.1234567=\2/
s/<.\([^.]\).\{16\}=/\1=/
t
s/<>\(.\)\w*\|=.*/\1/
s/\*>.\|.>/>/
t
Note that non-ascii characters in the above source code will be escaped (such as \x9f).