-er -ic b-p bbb bbc bbe bbh bbi bbn bbo bbp bbr bcb bcc bce bch bci bcn bco bcp bcr be- beb bec bee beh bei ben beo bep ber bhb bhc bhe bhh bhi bho bhp bhr bi- bib bic bie bih bii bin bio bip bir bnb bnc bne bni bnn bno bnp bnr bob boc boe boh boi bon boo bop bor bpb bpc bpe bph bpi bpn bpo bpp bpr brb bre brh bri brn bro brp brr c-- cbb cbc cbe cbh cbi cbn cbo cbp cbr ccb ccc cce cch cci ccn cco ccp ccr ce- ceb cec cee ceh cei cen ceo cep cer ch- chb chc che chh chi chn cho chp chr ci- cib cic cie cih cii cin cio cip cir cn- cnb cnc cne cnh cni cnn cno cnp cnr co- cob coc coe coh coi con coo cop cor cpb cpc cpe cph cpi cpn cpo cpp cpr crb crc cre crh cri crn cro crp crr ebb ebc ebe ebh ebi ebn ebo ebp ebr ec- ecb ecc ece ech eci ecn eco ecr eeb eec eee een eeo eep eer ehb ehc ehe ehh ehi ehn eho ehp ehr eib eic eie eii ein eio eip eir en- enb enc ene enh eni enn eno enp enr eo- eob eoc eoe eoh eoi eon eoo eop eor ep- epb epc epe eph epi epn epo epp epr erb erc ere erh eri ern ero erp err h-i hbb hbc hbe hbh hbi hbn hbo hbp hbr hcb hcc hce hch hci hcn hco hcp hcr he- heb hec hee heh hei hen heo hep her hhb hhc hhe hhh hhi hhn hho hhp hhr hib hic hie hih hii hin hio hip hir hnb hnc hne hnh hnn hno hob hoc hoe hoh hoi hon hoo hop hor hpb hpc hpe hph hpi hpn hpo hpp hpr hr- hrb hrc hre hrh hri hrn hro hrp hrr ibb ibc ibe ibh ibi ibn ibo ibp ibr icb icc ice ich ici icn ico icp icr ie- iec iee iei ien iep ier ihb ihc ihe ihh ihi ihn iho ihp ihr iib iic iie iih iii iin iio iip iir in- inb inc ine inh ini inn ino inp inr io- iob ioc ioe ioh ioi ion ioo iop ior ipb ipc ipe ipi ipn ipo ipp ipr ir- irb irc ire iri irn iro irp irr n-i nbb nbc nbe nbi nbn nbo nbp nbr ncb ncc nce nch nci ncn nco ncp ncr ne- neb nec nee neh nei nen neo nep ner nhb nhc nhe nhh nhi nhn nhp nhr nib nic nie nih nii nin nio nip nir nnb nnc nne nnh nni nnn nno nnp no- nob noc noe noh noi non noo nop nor npb npc npe nph npi npn npo npp npr nrb nrc nre nri nrn nro nrp nrr o-i ob- obb obc obe obh obi obn obo obp obr oc- ocb occ och oci ocn oco ocp ocr oeb oec oee oeh oei oen oeo oep oer ohc ohe ohh ohi ohn oho ohp ohr oib oic oie oii oin oio oip oir on- onb onc one onh oni onn ono onp onr oo- oob ooc ooh ooi oon ooo oop oor op- opb opc ope oph opi opn opo opp opr or- orb orc ore orh ori orn oro orp orr p-p pbb pbc pbe pbi pbn pbo pbp pbr pcb pcc pce pch pci pcn pco pcp pcr peb pec pee peh pei pen peo pep per phb phc phe phi phn pho php phr pib pic pie pih pii pin pio pip pir pn- pnb pnc pne pnh pni pnn pno pnp pnr pob poc poe poh poi pon poo pop por ppb ppc ppe pph ppi ppn ppo ppp ppr prb prc pre prh pri prn pro prp prr rbb rbc rbe rbh rbi rbn rbo rbp rbr rcb rcc rce rch rci rcn rco rcp rcr re- reb rec ree reh rei ren reo rep rer rh- rhb rhc rhe rhh rhi rhn rho rhp rhr rib ric rie rih rii rin rio rip rir rnb rnc rnh rni rnn rno rnp rnr rob roc roe roh roi ron roo rop ror rpb rpc rpe rph rpi rpn rpo rpp rpr rrb rrc rrh rri rrn rrp rrr