-ic b-u bbb bbc bbi bbo bbr bbt bbu bcb bcc bci bco bcr bct bcu bi- bib bic bii bio bir bit biu bob boc boi boo bor bot bou brb bri bro brr brt bru btb btc bti bto btr btt btu bub buc bui buo bur but buu c-- cbb cbc cbi cbo cbr cbt cbu ccb ccc cci cco ccr cct ccu ci- cib cic cii cio cir cit ciu co- cob coc coi coo cor cot cou crb crc cri cro crr crt cru ctb ctc cti cto ctr ctt ctu cub cuc cui cuo cur cut cuu ibb ibc ibi ibo ibr ibt ibu icb icc ici ico icr ict icu iib iic iii iio iir iit iiu io- iob ioc ioi ioo ior iot iou ir- irb irc iri iro irr irt iru itb itc iti ito itt itu iu- iub iuc iui iur iut o-i ob- obb obc obi obo obr obt obu oc- ocb occ oci oco ocr oct ocu oib oic oii oio oir oit oiu oo- oob ooc ooi ooo oor oot or- orb orc ori oro orr ort oru ot- otb otc oti oto otr ott otu ou- ouc oui ouo our out rbb rbc rbi rbo rbr rbt rbu rcb rcc rci rco rcr rct rcu rib ric rii rio rir rit rob roc roi roo ror rot rou rrb rrc rri rrr rrt rru rtb rtc rti rto rtr rtt rtu rub ruc rui ruo rur rut ruu tbb tbc tbi tbo tbr tbt tbu tcb tcc tci tco tcr tct tcu tib tic tii tio tir tit tiu to- tob toc toi too tor tot tou trb trc tri tro trr trt tru ttb ttc tti tto ttr ttt ttu tub tuc tui tuo tur tut tuu ubb ubc ubi ubo ubr ubt ubu ucb ucc uci uco ucr uct ucu uib uic uii uio uir uit uiu uob uoc uoo uor uot ur- urb urc uri uro urr urt uru utb utc uti uto utr utt utu uuc uur uut uuu