u3: rewrites u3r_mug_words, correct for arbitrary input
u3: rewrites u3r_mug_words, correct for arbitrary input

urbit/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,urbit/urbit,urbit/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,urbit/urbit