-ic b-u bbb bbc bbi bbo bbr bbt bbu bbx bcb bcc bci bco bcr bct bcu bcx bi- bib bic bii bio bir bit biu bix bob boc boi boo bor bot bou box brb bri bro brr brt bru brx btb btc bti bto btr btt btu btx bub buc bui buo bur but buu bux bxb bxi bxo bxx c-- cbb cbc cbi cbo cbr cbt cbu cbx ccb ccc cci cco ccr cct ccu ccx ci- cib cic cii cio cir cit ciu cix co- cob coc coi coo cor cot cou cox crb crc cri cro crr crt cru crx ctb ctc cti cto ctr ctt ctu ctx cub cuc cui cuo cur cut cuu cxc cxi cxo cxr cxt cxx ibb ibc ibi ibo ibr ibt ibu ibx icb icc ici ico icr ict icu iib iic iii iio iir iit iiu iix io- iob ioc ioi ioo ior iot iou ir- irb irc iri iro irr irt iru irx itb itc iti ito itt itu itx iu- iub iuc iui iur iut ixc ixi o-i ob- obb obc obi obo obr obt obu obx oc- ocb occ oci oco ocr oct ocu ocx oib oic oii oio oir oit oiu oo- oob ooc ooi ooo oor oot oox or- orb orc ori oro orr ort oru orx ot- otb otc oti oto otr ott otu ou- ouc oui ouo our out ox- oxb oxc oxi oxo oxt oxx rbb rbc rbi rbo rbr rbt rbu rbx rcb rcc rci rco rcr rct rcu rcx rib ric rii rio rir rit rix rob roc roi roo ror rot rou rox rrb rrc rri rrr rrt rru rtb rtc rti rto rtr rtt rtu rtx rub ruc rui ruo rur rut ruu rux rxr t-x tbb tbc tbi tbo tbr tbt tbu tcb tcc tci tco tcr tct tcu tcx tib tic tii tio tir tit tiu tix to- tob toc toi too tor tot tou tox trb trc tri tro trr trt tru trx ttb ttc tti tto ttr ttt ttu ttx tub tuc tui tuo tur tut tuu tux txi txt txu ubb ubc ubi ubo ubr ubt ubu ubx ucb ucc uci uco ucr uct ucu uib uic uii uio uir uit uiu uob uoc uoo uor uot uox ur- urb urc uri uro urr urt uru urx utb utc uti uto utr utt utu utx uuc uur uut uuu uxb uxc uxo uxr uxt uxu xbc xbr xbx xcb xci xcr xcx xic xii xio xit xiu xix xoc xoi xoo xor xot xox xrc xrt xrx xtc xti xtr xtx xui xxi xxo xxx