-ic b-p bbb bbc bbi bbo bbp bbr bbt bby bcb bcc bci bco bcp bcr bct bcy bi- bib bic bii bio bip bir bit biy bob boc boi boo bop bor bot boy bpb bpc bpi bpo bpp bpr bpt bpy brb bri bro brp brr brt bry btb btc bti bto btp btr btt bty by- byc byi byo byp byr byt c-- cbb cbc cbi cbo cbp cbr cbt cby ccb ccc cci cco ccp ccr cct ci- cib cic cii cio cip cir cit co- cob coc coi coo cop cor cot coy cpb cpc cpi cpo cpp cpr cpt crb crc cri cro crp crr crt cry ctb ctc cti cto ctp ctr ctt cty cyb cyc cyo cyp cyr cyt ibb ibc ibi ibo ibp ibr ibt iby icb icc ici ico icp icr ict icy iib iic iii iio iip iir iit io- iob ioc ioi ioo iop ior iot ipb ipc ipi ipo ipp ipr ipt ipy ir- irb irc iri iro irp irr irt iry itb itc iti ito itp itt ity iyc iyo iyr iyt iyy o-i ob- obb obc obi obo obp obr obt oby oc- ocb occ oci oco ocp ocr oct oib oic oii oio oip oir oit oo- oob ooc ooi ooo oop oor oot op- opb opc opi opo opp opr opt opy or- orb orc ori oro orp orr ort ory ot- otb otc oti oto otp otr ott oyi oyo p-p pbb pbc pbi pbo pbp pbr pbt pby pcb pcc pci pco pcp pcr pct pib pic pii pio pip pir pit pob poc poi poo pop por pot poy ppb ppc ppi ppo ppp ppr ppt prb prc pri pro prp prr prt pry pt- ptb ptc pti pto ptp ptr ptt pty py- pyb pyc pyo pyr pyt rbb rbc rbi rbo rbp rbr rbt rcb rcc rci rco rcp rcr rct rib ric rii rio rip rir rit riy rob roc roi roo rop ror rot roy rpb rpc rpi rpo rpp rpr rpt rrb rrc rri rrp rrr rrt rtb rtc rti rto rtp rtr rtt rty ry- ryc ryo ryr ryy tbb tbc tbi tbo tbp tbr tbt tcb tcc tci tco tcp tcr tct tib tic tii tio tip tir tit tiy to- tob toc toi too top tor tot toy tpb tpc tpi tpo tpp tpr tpt trb trc tri tro trp trr trt try ttb ttc tti tto ttp ttr ttt tty tyc tyo typ tyr tyt ybc ybi ybp ybr yby ycc yci yco ycp ycy yii yio yip yir yit yob yoc yoi yoo yop yor yot yoy ypo yrc yro yrp yrt ytc yto ytp ytr ytt yyb yyc yyt yyy