-er -ic b-p bbb bbc bbd bbe bbi bbo bbp bbr bcb bcc bcd bce bci bco bcp bcr bdb bdc bdd bde bdi bdo bdp bdr be- beb bec bed bee bei beo bep ber bi- bib bic bid bie bii bio bip bir bob boc bod boe boi boo bop bor bpb bpc bpd bpe bpi bpo bpp bpr brb brd bre bri bro brp brr c-- cbb cbc cbd cbe cbi cbo cbp cbr ccb ccc ccd cce cci cco ccp ccr cdb cdc cdd cde cdi cdo cdp cdr ce- ceb cec ced cee cei ceo cep cer ci- cib cic cid cie cii cio cip cir co- cob coc cod coe coi coo cop cor cpb cpc cpd cpe cpi cpo cpp cpr crb crc crd cre cri cro crp crr dbb dbc dbd dbe dbi dbo dbp dbr dcb dcc dcd dce dci dco dcp dcr ddb ddc ddd dde ddi ddo ddp ddr de- deb dec ded dee dei deo dep der di- dib dic did die dii dio dip dir dob doc dod doe doi doo dop dor dpb dpc dpd dpe dpi dpo dpp dpr drb drc drd dre dri dro drp drr ebb ebc ebd ebe ebi ebo ebp ebr ec- ecb ecc ecd ece eci eco ecr ed- edb edc edd ede edi edo edp edr eeb eec eed eee eeo eep eer eib eic eid eie eii eio eip eir eo- eob eoc eod eoe eoi eoo eop eor ep- epb epc epd epe epi epo epp epr erb erc erd ere eri ero erp err i-d ibb ibc ibd ibe ibi ibo ibp ibr icb icc icd ice ici ico icp icr idb idc idd ide idi ido idp idr ie- iec ied iee iei iep ier iib iic iid iie iii iio iip iir io- iob ioc iod ioe ioi ioo iop ior ipb ipc ipd ipe ipi ipo ipp ipr ir- irb irc ird ire iri iro irp irr o-i ob- obb obc obd obe obi obo obp obr oc- ocb occ ocd oci oco ocp ocr odb odc odd ode odi odo odp odr oeb oec oed oee oei oeo oep oer oib oic oid oie oii oio oip oir oo- oob ooc ood ooi ooo oop oor op- opb opc opd ope opi opo opp opr or- orb orc ord ore ori oro orp orr p-p pbb pbc pbd pbe pbi pbo pbp pbr pcb pcc pcd pce pci pco pcp pcr pdb pdc pdd pde pdi pdo pdp pdr peb pec ped pee pei peo pep per pib pic pid pie pii pio pip pir pob poc pod poe poi poo pop por ppb ppc ppd ppe ppi ppo ppp ppr prb prc prd pre pri pro prp prr rbb rbc rbd rbe rbi rbo rbp rbr rcb rcc rcd rce rci rco rcp rcr rdb rdc rdd rde rdi rdo rdp rdr re- reb rec red ree rei reo rep rer rib ric rid rie rii rio rip rir rob roc rod roe roi roo rop ror rpb rpc rpd rpe rpi rpo rpp rpr rrb rrc rrd rri rrp rrr