-ic b-u bbb bbc bbi bbr bbu bcb bcc bci bcr bcu bcz bi- bib bic bii bir biu biz brb bri brr bru brz bub buc bui bur buu buz bzr bzu bzz c-- cbb cbc cbi cbr cbu cbz ccb ccc cci ccr ccu ccz ci- cib cic cii cir ciu crb crc cri crr cru crz cub cuc cui cur cuu cuz cz- czc ibb ibc ibi ibr ibu ibz icb icc ici icr icu icz iib iic iii iir iiu ir- irb irc iri irr iru iu- iub iuc iui iur iuz izi izu izz rbb rbc rbi rbr rbu rcb rcc rci rcr rcu rib ric rii rir riz rrb rrc rri rrr rru rub ruc rui rur ruu ruz rzb ubb ubc ubi ubr ubu ucb ucc uci ucr ucu uib uic uii uir uiu ur- urb urc uri urr uru urz uuc uur uuu uzb uzi uzu zbb zbc zbr zib zir ziz zub zuc zui zur zuz zzr zzz