-er -ic b-p bbb bbc bbe bbf bbi bbo bbp bbr bbs bbt bcb bcc bce bcf bci bco bcp bcr bcs bct be- beb bec bee bef bei beo bep ber bes bet bfb bfc bfe bff bfi bfo bfp bfr bfs bft bi- bib bic bie bif bii bio bip bir bis bit bob boc boe bof boi boo bop bor bos bot bpb bpc bpe bpf bpi bpo bpp bpr bps bpt brb bre brf bri bro brp brr brs brt bsb bsc bse bsf bsi bso bsp bsr bss bst btb btc bte btf bti bto btp btr bts btt c-- cbb cbc cbe cbf cbi cbo cbp cbr cbs cbt ccb ccc cce ccf cci cco ccp ccr ccs cct ce- ceb cec cee cef cei ceo cep cer ces cet cfb cfc cfe cff cfi cfo cfp cfr cfs cft ci- cib cic cie cif cii cio cip cir cis cit co- cob coc coe cof coi coo cop cor cos cot cpb cpc cpe cpf cpi cpo cpp cpr cps cpt crb crc cre crf cri cro crp crr crs crt csb csc cse csf csi cso csp csr css cst ctb ctc cte ctf cti cto ctp ctr cts ctt ebb ebc ebe ebf ebi ebo ebp ebr ebs ebt ec- ecb ecc ece ecf eci eco ecr ecs ect eeb eec eee eef eeo eep eer ees eet ef- efb efc efe eff efi efo efp efr efs eft eib eic eie eif eii eio eip eir eis eit eo- eob eoc eoe eof eoi eoo eop eor eos eot ep- epb epc epe epf epi epo epp epr eps ept erb erc ere erf eri ero erp err ers ert es- esb esc ese esf esi eso esp esr ess est etb etc ete etf eti eto etp etr ets ett fbb fbc fbe fbf fbi fbo fbp fbr fbs fbt fcb fcc fce fcf fci fco fcp fcr fcs fct feb fec fee fef fei feo fep fer fes fet ffc ffe fff ffi ffo ffp ffr ffs fft fib fic fie fif fii fip fir fis fit fob foc foe fof foi foo fop for fos fot fpb fpc fpe fpi fpo fpp fpr fps fpt frb frc fre frf fri fro frp frr frs frt fsb fsc fse fsf fsi fso fsp fsr fss fst ftb ftc fte ftf fti fto ftp ftr fts ftt i-f ibb ibc ibe ibf ibi ibo ibp ibr ibs ibt icb icc ice icf ici ico icp icr ics ict ie- iec iee ief iei iep ier ies iet ifb ifc ife iff ifi ifo ifp ifr ifs ift iib iic iie iif iii iio iip iir iis iit io- iob ioc ioe iof ioi ioo iop ior ios iot ipb ipc ipe ipf ipi ipo ipp ipr ips ipt ir- irb irc ire irf iri iro irp irr irs irt is- isb isc ise isf isi iso isp isr iss ist itb itc ite itf iti ito itp its itt o-i ob- obb obc obe obf obi obo obp obr obs obt oc- ocb occ ocf oci oco ocp ocr ocs oct oeb oec oee oef oei oeo oep oer oes oet of- ofb ofc ofe off ofi ofo ofp ofr ofs oft oib oic oie oif oii oio oip oir ois oit oo- oob ooc oof ooi ooo oop oor oos oot op- opb opc ope opf opi opo opp opr ops opt or- orb orc ore orf ori oro orp orr ors ort os- osb osc ose osf osi oso osp osr oss ost ot- otb otc ote otf oti oto otp otr ots ott p-p pbb pbc pbe pbf pbi pbo pbp pbr pbs pbt pcb pcc pce pcf pci pco pcp pcr pcs pct peb pec pee pef pei peo pep per pes pet pfb pfc pfe pff pfi pfo pfp pfr pfs pft pib pic pie pif pii pio pip pir pis pit pob poc poe pof poi poo pop por pos pot ppb ppc ppe ppf ppi ppo ppp ppr pps ppt prb prc pre prf pri pro prp prr prs prt ps- psb psc pse psf psi pso psp psr pss pst pt- ptb ptc pte ptf pti pto ptp ptr pts ptt rbb rbc rbe rbf rbi rbo rbp rbr rbs rbt rcb rcc rce rcf rci rco rcp rcr rcs rct re- reb rec ree ref rei reo rep rer res ret rfb rfc rfe rff rfi rfo rfp rfr rfs rft rib ric rie rif rii rio rip rir ris rit rob roc roe rof roi roo rop ror ros rot rpb rpc rpe rpf rpi rpo rpp rpr rps rpt rrb rrc rrf rri rrp rrr rrs rrt rsb rsc rse rsf rsi rso rsp rsr rss rst rtb rtc rte rtf rti rto rtp rtr rts rtt sbb sbc sbe sbf sbi sbo sbp sbr sbs sbt scb scc sce scf sci sco scp scr scs sct se- seb sec see sef sei seo sep ser ses set sfb sfc sfe sff sfi sfo sfp sfr sfs sft sib sic sie sif sii sio sip sir sis sit sob soc soe sof soi soo sop sor sos sot spb spc spe spf spi spo spp spr sps spt sr- srb src sre srf sri sro srp srr srs srt ss- ssb ssc sse ssf ssi sso ssp ssr sss sst stb stc ste stf sti sto stp str sts stt tbb tbc tbe tbf tbi tbo tbp tbr tbs tbt tcb tcc tce tcf tci tco tcp tcr tcs tct te- teb tec tee tef tei teo tep ter tes tet tfb tfc tfe tff tfi tfo tfp tfr tfs tft tib tic tie tif tii tio tip tir tis tit to- tob toc toe tof toi too top tor tos tot tpb tpc tpe tpf tpi tpo tpp tpr tps tpt trb trc tre trf tri tro