-er -ic b-p bbb bbc bbe bbf bbi bbo bbp bbr bbt bcb bcc bce bcf bci bco bcp bcr bct be- beb bec bee bef bei beo bep ber bet bfb bfc bfe bff bfi bfo bfp bfr bft bi- bib bic bie bif bii bio bip bir bit bob boc boe bof boi boo bop bor bot bpb bpc bpe bpf bpi bpo bpp bpr bpt brb bre brf bri bro brp brr brt btb btc bte btf bti bto btp btr btt c-- cbb cbc cbe cbf cbi cbo cbp cbr cbt ccb ccc cce ccf cci cco ccp ccr cct ce- ceb cec cee cef cei ceo cep cer cet cfb cfc cfe cff cfi cfo cfp cfr cft ci- cib cic cie cif cii cio cip cir cit co- cob coc coe cof coi coo cop cor cot cpb cpc cpe cpf cpi cpo cpp cpr cpt crb crc cre crf cri cro crp crr crt ctb ctc cte ctf cti cto ctp ctr ctt ebb ebc ebe ebf ebi ebo ebp ebr ebt ec- ecb ecc ece ecf eci eco ecr ect eeb eec eee eef eeo eep eer eet ef- efb efc efe eff efi efo efp efr eft eib eic eie eif eii eio eip eir eit eo- eob eoc eoe eof eoi eoo eop eor eot ep- epb epc epe epf epi epo epp epr ept erb erc ere erf eri ero erp err ert etb etc ete etf eti eto etp etr ett fbb fbc fbe fbf fbi fbo fbp fbr fbt fcb fcc fce fcf fci fco fcp fcr fct feb fec fee fef fei feo fep fer fet ffc ffe fff ffi ffo ffp ffr fft fib fic fie fif fii fip fir fit fob foc foe fof foi foo fop for fot fpb fpc fpe fpi fpo fpp fpr fpt frb frc fre frf fri fro frp frr frt ftb ftc fte ftf fti fto ftp ftr ftt i-f ibb ibc ibe ibf ibi ibo ibp ibr ibt icb icc ice icf ici ico icp icr ict ie- iec iee ief iei iep ier iet ifb ifc ife iff ifi ifo ifp ifr ift iib iic iie iif iii iio iip iir iit io- iob ioc ioe iof ioi ioo iop ior iot ipb ipc ipe ipf ipi ipo ipp ipr ipt ir- irb irc ire irf iri iro irp irr irt itb itc ite itf iti ito itp itt o-i ob- obb obc obe obf obi obo obp obr obt oc- ocb occ ocf oci oco ocp ocr oct oeb oec oee oef oei oeo oep oer oet of- ofb ofc ofe off ofi ofo ofp ofr oft oib oic oie oif oii oio oip oir oit oo- oob ooc oof ooi ooo oop oor oot op- opb opc ope opf opi opo opp opr opt or- orb orc ore orf ori oro orp orr ort ot- otb otc ote otf oti oto otp otr ott p-p pbb pbc pbe pbf pbi pbo pbp pbr pbt pcb pcc pce pcf pci pco pcp pcr pct peb pec pee pef pei peo pep per pet pfb pfc pfe pff pfi pfo pfp pfr pft pib pic pie pif pii pio pip pir pit pob poc poe pof poi poo pop por pot ppb ppc ppe ppf ppi ppo ppp ppr ppt prb prc pre prf pri pro prp prr prt pt- ptb ptc pte ptf pti pto ptp ptr ptt rbb rbc rbe rbf rbi rbo rbp rbr rbt rcb rcc rce rcf rci rco rcp rcr rct re- reb rec ree ref rei reo rep rer ret rfb rfc rfe rff rfi rfo rfp rfr rft rib ric rie rif rii rio rip rir rit rob roc roe rof roi roo rop ror rot rpb rpc rpe rpf rpi rpo rpp rpr rpt rrb rrc rrf rri rrp rrr rrt rtb rtc rte rtf rti rto rtp rtr rtt tbb tbc tbe tbf tbi tbo tbp tbr tbt tcb tcc tce tcf tci tco tcp tcr tct te- teb tec tee tef tei teo tep ter tet tfb tfc tfe tff tfi tfo tfp tfr tft tib tic tie tif tii tio tip tir tit to- tob toc toe tof toi too top tor tot tpb tpc tpe tpf tpi tpo tpp tpr tpt trb trc tre trf tri tro trp trr trt ttb ttc tte ttf tti tto ttp ttr ttt