-er -ic b-p bbb bbc bbd bbe bbi bbo bbp bbr bbs bbt bcb bcc bcd bce bci bco bcp bcr bcs bct bdb bdc bdd bde bdi bdo bdp bdr bds bdt be- beb bec bed bee bei beo bep ber bes bet bi- bib bic bid bie bii bio bip bir bis bit bob boc bod boe boi boo bop bor bos bot bpb bpc bpd bpe bpi bpo bpp bpr bps bpt brb brd bre bri bro brp brr brs brt bsb bsc bsd bse bsi bso bsp bsr bss bst btb btc btd bte bti bto btp btr bts btt c-- cbb cbc cbd cbe cbi cbo cbp cbr cbs cbt ccb ccc ccd cce cci cco ccp ccr ccs cct cdb cdc cdd cde cdi cdo cdp cdr cds cdt ce- ceb cec ced cee cei ceo cep cer ces cet ci- cib cic cid cie cii cio cip cir cis cit co- cob coc cod coe coi coo cop cor cos cot cpb cpc cpd cpe cpi cpo cpp cpr cps cpt crb crc crd cre cri cro crp crr crs crt csb csc csd cse csi cso csp csr css cst ctb ctc ctd cte cti cto ctp ctr cts ctt dbb dbc dbd dbe dbi dbo dbp dbr dbs dbt dcb dcc dcd dce dci dco dcp dcr dcs dct ddb ddc ddd dde ddi ddo ddp ddr dds ddt de- deb dec ded dee dei deo dep der des det di- dib dic did die dii dio dip dir dis dit dob doc dod doe doi doo dop dor dos dot dpb dpc dpd dpe dpi dpo dpp dpr dps dpt drb drc drd dre dri dro drp drr drs drt dsb dsc dsd dse dsi dso dsp dsr dss dst dtb dtc dtd dte dti dto dtp dtr dts dtt ebb ebc ebd ebe ebi ebo ebp ebr ebs ebt ec- ecb ecc ecd ece eci eco ecr ecs ect ed- edb edc edd ede edi edo edp edr eds edt eeb eec eed eee eeo eep eer ees eet eib eic eid eie eii eio eip eir eis eit eo- eob eoc eod eoe eoi eoo eop eor eos eot ep- epb epc epd epe epi epo epp epr eps ept erb erc erd ere eri ero erp err ers ert es- esb esc esd ese esi eso esp esr ess est etb etc etd ete eti eto etp etr ets ett i-d ibb ibc ibd ibe ibi ibo ibp ibr ibs ibt icb icc icd ice ici ico icp icr ics ict idb idc idd ide idi ido idp idr ids idt ie- iec ied iee iei iep ier ies iet iib iic iid iie iii iio iip iir iis iit io- iob ioc iod ioe ioi ioo iop ior ios iot ipb ipc ipd ipe ipi ipo ipp ipr ips ipt ir- irb irc ird ire iri iro irp irr irs irt is- isb isc isd ise isi iso isp isr iss ist itb itc itd ite iti ito itp its itt o-i ob- obb obc obd obe obi obo obp obr obs obt oc- ocb occ ocd oci oco ocp ocr ocs oct odb odc odd ode odi odo odp odr ods odt oeb oec oed oee oei oeo oep oer oes oet oib oic oid oie oii oio oip oir ois oit oo- oob ooc ood ooi ooo oop oor oos oot op- opb opc opd ope opi opo opp opr ops opt or- orb orc ord ore ori oro orp orr ors ort os- osb osc osd ose osi oso osp osr oss ost ot- otb otc otd ote oti oto otp otr ots ott p-p pbb pbc pbd pbe pbi pbo pbp pbr pbs pbt pcb pcc pcd pce pci pco pcp pcr pcs pct pdb pdc pdd pde pdi pdo pdp pdr pds pdt peb pec ped pee pei peo pep per pes pet pib pic pid pie pii pio pip pir pis pit pob poc pod poe poi poo pop por pos pot ppb ppc ppd ppe ppi ppo ppp ppr pps ppt prb prc prd pre pri pro prp prr prs prt ps- psb psc psd pse psi pso psp psr pss pst pt- ptb ptc ptd pte pti pto ptp ptr pts ptt rbb rbc rbd rbe rbi rbo rbp rbr rbs rbt rcb rcc rcd rce rci rco rcp rcr rcs rct rdb rdc rdd rde rdi rdo rdp rdr rds rdt re- reb rec red ree rei reo rep rer res ret rib ric rid rie rii rio rip rir ris rit rob roc rod roe roi roo rop ror ros rot rpb rpc rpd rpe rpi rpo rpp rpr rps rpt rrb rrc rrd rri rrp rrr rrs rrt rsb rsc rsd rse rsi rso rsp rsr rss rst rtb rtc rtd rte rti rto rtp rtr rts rtt sbb sbc sbd sbe sbi sbo sbp sbr sbs sbt scb scc scd sce sci sco scp scr scs sct sdb sdc sdd sde sdi sdo sdp sdr sds sdt se- seb sec sed see sei seo sep ser ses set sib sic sid sie sii sio sip sir sis sit sob soc sod soe soi soo sop sor sos sot spb spc spd spe spi spo spp spr sps spt sr- srb src srd sre sri sro srp srr srs srt ss- ssb ssc ssd sse ssi sso ssp ssr sss sst stb stc std ste sti sto stp str sts stt tbb tbc tbd tbe tbi tbo tbp tbr tbs tbt tcb tcc tcd tce tci tco tcp tcr tcs tct tdb tdc tdd tde tdi tdo tdp tdr tds tdt te- teb tec ted tee tei teo tep ter tes tet tib tic tid tie tii tio tip tir tis tit to- tob toc tod toe toi too top tor tos tot tpb tpc tpd tpe tpi tpo tpp tpr tps tpt trb trc