-ic b-u bbb bbc bbi bbk bbn bbr bbu bcb bcc bci bck bcn bcr bcu bi- bib bic bii bik bin bir biu bkb bkc bkk bkn bkr bnb bnc bni bnk bnn bnr bnu brb bri brk brn brr bru bub buc bui buk bun bur buu c-- cbb cbc cbi cbk cbn cbr cbu ccb ccc cci cck ccn ccr ccu ci- cib cic cii cik cin cir ciu ckb ckc cki cn- cnb cnc cni cnn cnr cnu crb crc cri crk crn crr cru cub cuc cui cuk cun cur cuu ibb ibc ibi ibk ibn ibr ibu icb icc ici ick icn icr icu iib iic iii iin iir iiu ikb ikc iki ikk ikr iku in- inb inc ini ink inn inr inu ir- irb irc iri irk irn irr iru iu- iub iuc iui iur kbb kbc kbi kbk kbn kbr kbu kcb kcc kci kck kcn kcr kcu kib kic kii kik kin kir kiu kkb kkc kki kkk kkn kkr kku kn- knc kni knk knn knr knu krc kri krk krn krr kru kub kuc kui kuk kun kur kuu n-i nbb nbc nbi nbk nbn nbr nbu ncb ncc nci nck ncn ncr ncu nib nic nii nik nin nir niu nkc nki nkk nkn nkr nku nnb nnc nni nnk nnn nnu nrb nrc nri nrk nrn nrr nru nub nuc nui nuk nun nur nuu rbb rbc rbi rbk rbn rbr rbu rcb rcc rci rcn rcr rcu rib ric rii rik rin rir rkb rkc rkk rku rnb rnc rni rnn rnr rnu rrb rrc rri rrk rrn rrr rru rub ruc rui ruk run rur ruu ubb ubc ubi ubk ubn ubr ubu ucb ucc uci uck ucn ucr ucu uib uic uii uin uir uiu ukb ukc uki ukk ukn ukr uku un- unb unc uni unk unn unr unu ur- urb urc uri urk urn urr uru uuc uun uur uuu