-ic b-p bbb bbc bbi bbk bbo bbp bbr bbt bcb bcc bci bck bco bcp bcr bct bcv bi- bib bic bii bik bio bip bir bit biv bkb bkc bkk bko bkp bkr bkt bkv bob boc boi bok boo bop bor bot bov bpb bpc bpi bpo bpp bpr bpt bpv brb bri brk bro brp brr brt brv btb btc bti btk bto btp btr btt btv bvb bvc bvi bvk bvo bvp bvr bvt bvv c-- cbb cbc cbi cbk cbo cbp cbr cbt cbv ccb ccc cci cck cco ccp ccr cct ccv ci- cib cic cii cik cio cip cir cit civ ckb ckc cki cko ckt co- cob coc coi cok coo cop cor cot cov cpb cpc cpi cpk cpo cpp cpr cpt cpv crb crc cri crk cro crp crr crt crv ctb ctc cti ctk cto ctp ctr ctt ctv cvb cvc cvi cvk cvo cvp cvr cvt cvv i-v ibb ibc ibi ibk ibo ibp ibr ibt ibv icb icc ici ick ico icp icr ict icv iib iic iii iio iip iir iit ikb ikc iki ikk iko ikr ikt ikv io- iob ioc ioi ioo iop ior iot iov ipb ipc ipi ipo ipp ipr ipt ipv ir- irb irc iri irk iro irp irr irt irv itb itc iti itk ito itp itt itv ivb ivc ivi ivo ivp ivr ivt ivv k-t kbb kbc kbi kbk kbo kbp kbr kcb kcc kci kck kcp kcr kct kib kic kii kik kio kip kir kit kiv kkb kkc kki kkk kkp kkr kkt kkv kob koc koi kok koo kop kor kot kpc kpi kpk kpo kpp kpr kpt kpv krc kri krk kro krp krr krt krv ktb ktc ktk kto ktp ktr ktt ktv kvb kvi kvk kvo kvp kvr kvv o-i ob- obb obc obi obk obo obp obr obt obv oc- ocb occ oci ock oco ocp ocr oct ocv oib oic oii oik oio oip oir oit oiv okb okc oki okk oko okp okr oo- oob ooc ooi ook ooo oop oor oot oov op- opb opc opi opk opo opp opr opt opv or- orb orc ori ork oro orp orr ort orv ot- otb otc oti otk oto otp otr ott otv ov- ovb ovc ovi ovo ovp ovv p-p pbb pbc pbi pbk pbo pbp pbr pbt pcb pcc pci pck pco pcp pcr pct pcv pib pic pii pik pio pip pir pit piv pkb pkc pki pko pkp pkr pkt pob poc poi pok poo pop por pot pov ppb ppc ppi ppk ppo ppp ppr ppt ppv prb prc pri prk pro prp prr prt prv pt- ptb ptc pti ptk pto ptp ptr ptt ptv pvb pvc pvi pvk pvo pvp pvr pvt pvv rbb rbc rbi rbk rbo rbp rbr rbt rcb rcc rci rco rcp rcr rct rcv rib ric rii rik rio rip rir rit riv rkb rkc rkk rko rkp rkt rkv rob roc roi rok roo rop ror rot rov rpb rpc rpi rpk rpo rpp rpr rpt rpv rrb rrc rri rrk rrp rrr rrt rtb rtc rti rtk rto rtp rtr rtt rtv rvb rvc rvi rvo rvp rvr rvt rvv tbb tbc tbi tbk tbo tbp tbr tbt tbv tcb tcc tci tck tco tcp tcr tct tcv tib tic tii tik tio tip tir tit tiv tkb tkc tkk tko tkp tkr tkt to- tob toc toi tok too top tor tot tov tpb tpc tpi tpk tpo tpp tpr tpt tpv trb trc tri trk tro trp trr trt trv ttb ttc tti ttk tto ttp ttr ttt ttv tvb tvc tvi tvk tvo tvp tvr tvt vbc vbi vbk vbo vbr vbv vcc vci vco vcp vcr vct vi- vib vic vii vik vio vip vir vit viv vkb vkp vkt vob voc voi vok voo vop vor vot vov vpb vpc vpi vpk vpo vpp vpr vpt vrb vrc vri vrk vrp vrr vrt vtb vtc vti vtk vto vtr vtt vtv vvb vvc vvi vvo vvr vvt vvv