b-u bbb bbc bbn bbr bbu bcb bcc bcn bcr bcu bnb bnc bnn bnr bnu brb brn brr bru bub buc bun bur buu c-- cbb cbc cbn cbr cbu ccb ccc ccn ccr ccu cn- cnb cnc cnn cnr cnu crb crc crn crr cru cub cuc cun cur cuu nbb nbc nbn nbr nbu ncb ncc ncn ncr ncu nnb nnc nnn nnu nrb nrc nrn nrr nru nub nuc nun nur nuu rbb rbc rbn rbr rbu rcb rcc rcn rcr rcu rnb rnc rnn rnr rnu rrb rrc rrn rrr rru rub ruc run rur ruu ubb ubc ubn ubr ubu ucb ucc ucn ucr ucu un- unb unc unn unr unu ur- urb urc urn urr uru uuc uun uur uuu

bbbb bbrc bcbc bccc bcnu bcru bcuc bnrr brcb brrr bruc brun bubb bubu bucc bucu bunb bunn bunu bur- burb burn burr buru cbbc cbcc cbcn cbcr cbcu cbrn ccbc ccbn cccb cccc cccu ccnb ccnc ccnr ccnu ccrc ccuc cnbc cnrc cnrr crbc crbu crcc crcr crub crun cub- cubb cucc cucn curb curn curr nbbc nbcc ncbc nccc nccn nccr nccu ncnc ncrc nnnn nrrc nubc nucu nunc nunn nurc nurn nurr nuru rbbb rbbr rcbc rccb rccc rcnr rnbr rrrr rrun rubb rubu runc runn rurc ruru ruun ucbc ucrc uncc urun urur uuuu

brrrr brunn bruun bucur bunun burcu burn- burru buruc burun ccccc cnnnn cubub nu-nu nunun nurun runcu unnun unnur unrun unurn urubu urucu uuuuu

bbbbbb brubru bububu burbur cucurb ucuncu unburn

bbbbbbb

bbbbbbbb buruburu burunucu cucurucu curucucu

runrunrun

bbbbbbbbbbbbbbb ccccccccccccccc