G
:
s/.\w*/&0&1&2&3&4&5&6&7&9&8&b&a&d&c&f&e/g
T
s/\(.[13579bdf]\w...\)\(......\)/\2\1/g
T
s/\(\n[2367abef].\{10\}\)\(.\{12\}\)/\2\1/g
s/^.\|\(\n[4-7c-f].\{22\}\)\(.\{24\}\)/\2\1/g
L49
d