-ic b-u bbb bbc bbi bbn bbr bbu bcb bcc bci bcn bcr bcu bi- bib bic bii bin bir biu bnb bnc bni bnn bnr bnu brb bri brn brr bru bub buc bui bun bur buu c-- cbb cbc cbi cbn cbr cbu ccb ccc cci ccn ccr ccu ci- cib cic cii cin cir ciu cn- cnb cnc cni cnn cnr cnu crb crc cri crn crr cru cub cuc cui cun cur cuu ibb ibc ibi ibn ibr ibu icb icc ici icn icr icu iib iic iii iin iir iiu in- inb inc ini inn inr inu ir- irb irc iri irn irr iru iu- iub iuc iui iur n-i nbb nbc nbi nbn nbr nbu ncb ncc nci ncn ncr ncu nib nic nii nin nir niu nnb nnc nni nnn nnu nrb nrc nri nrn nrr nru nub nuc nui nun nur nuu rbb rbc rbi rbn rbr rbu rcb rcc rci rcn rcr rcu rib ric rii rin rir rnb rnc rni rnn rnr rnu rrb rrc rri rrn rrr rru rub ruc rui run rur ruu ubb ubc ubi ubn ubr ubu ucb ucc uci ucn ucr ucu uib uic uii uin uir uiu un- unb unc uni unn unr unu ur- urb urc uri urn urr uru uuc uun uur uuu