-er a-a a-b a-i aaa aab aae aah aai aan aao aap aar aas ab- aba abb abe abh abi abn abo abp abr abs aea aeb aee aeh aei aen aeo aep aer aes aha ahb ahe ahh ahi ahn aho ahp ahr ahs ai- aia aib aie aih aii ain aio aip air ais an- ana anb ane anh ani ann ano anp anr ans aoa aob aoe aoh aoi aon aoo aop aor aos ap- apa apb ape aph api apn apo app apr aps ar- ara arb are arh ari arn aro arp arr ars as- asa asb ase ash asi asn aso asp asr ass b-p baa bab bae bah bai ban bao bap bar bas bba bbb bbe bbh bbi bbn bbo bbp bbr bbs be- bea beb bee beh bei ben beo bep ber bes bha bhb bhe bhh bhi bho bhp bhr bhs bi- bia bib bie bih bii bin bio bip bir bis bna bnb bne bni bnn bno bnp bnr bns boa bob boe boh boi bon boo bop bor bos bpa bpb bpe bph bpi bpn bpo bpp bpr bps bra brb bre brh bri brn bro brp brr brs bsa bsb bse bsh bsi bsn bso bsp bsr bss eaa eab eae eah eai ean eao eap ear eas eba ebb ebe ebh ebi ebn ebo ebp ebr ebs eea eeb eee een eeo eep eer ees eha ehb ehe ehh ehi ehn eho ehp ehr ehs eia eib eie eii ein eio eip eir eis en- ena enb ene enh eni enn eno enp enr ens eo- eoa eob eoe eoh eoi eon eoo eop eor eos ep- epa epb epe eph epi epn epo epp epr eps era erb ere erh eri ern ero erp err ers es- esa esb ese esh esi esn eso esp esr ess h-i haa hab hae hah hai han hao hap har has hba hbb hbe hbh hbi hbn hbo hbp hbr hbs he- hea heb hee heh hei hen heo hep her hes hha hhb hhe hhh hhi hhn hho hhp hhr hhs hia hib hie hih hii hin hio hip hir his hna hnb hne hnh hnn hno hns hoa hob hoe hoh hoi hon hoo hop hor hos hpa hpb hpe hph hpi hpn hpo hpp hpr hps hr- hra hrb hre hrh hri hrn hro hrp hrr hrs hsa hsb hse hsh hsi hsn hsp hsr hss ia- iaa iab iae iah iai ian iao iap iar ias iba ibb ibe ibh ibi ibn ibo ibp ibr ibs ie- iea iee iei ien iep ier ies iha ihb ihe ihh ihi ihn iho ihp ihr ihs iia iib iie iih iii iin iio iip iir iis in- ina inb ine inh ini inn ino inp inr ins io- ioa iob ioe ioh ioi ion ioo iop ior ios ipa ipb ipe ipi ipn ipo ipp ipr ips ir- ira irb ire iri irn iro irp irr irs is- isa isb ise ish isi isn iso isp isr iss n-i naa nab nae nah nai nan nao nap nar nas nba nbb nbe nbi nbn nbo nbp nbr nbs ne- nea neb nee neh nei nen neo nep ner nes nha nhb nhe nhh nhi nhn nhp nhr nhs nia nib nie nih nii nin nio nip nir nis nna nnb nne nnh nni nnn nno nnp nns no- noa nob noe noh noi non noo nop nor nos npa npb npe nph npi npn npo npp npr nps nra nrb nre nri nrn nro nrp nrr nrs nsa nsb nse nsh nsi nsn nso nsp nsr nss o-i oaa oab oae oah oai oan oao oap oar oas ob- oba obb obe obh obi obn obo obp obr obs oea oeb oee oeh oei oen oeo oep oer oes oha ohe ohh ohi ohn oho ohp ohr ohs oia oib oie oii oin oio oip oir ois on- ona onb one onh oni onn ono onp onr ons oo- ooa oob ooh ooi oon ooo oop oor oos op- opa opb ope oph opi opn opo opp opr ops or- ora orb ore orh ori orn oro orp orr ors os- osa osb ose osh osi osn oso osp osr oss p-p paa pab pae pah pai pan pao pap par pas pba pbb pbe pbi pbn pbo pbp pbr pbs pea peb pee peh pei pen peo pep per pes pha phb phe phi phn pho php phr phs pia pib pie pih pii pin pio pip pir pis pn- pna pnb pne pnh pni pnn pno pnp pnr pns poa pob poe poh poi pon poo pop por pos ppa ppb ppe pph ppi ppn ppo ppp ppr pps pra prb pre prh pri prn pro prp prr prs ps- psa psb pse psh psi psn pso psp psr pss ra- raa rab rae rah rai ran rao rap rar ras rba rbb rbe rbh rbi rbn rbo rbp rbr rbs re- rea reb ree reh rei ren reo rep rer res rh- rha rhb rhe rhh rhi rhn rho rhp rhr rhs ria rib rie rih rii rin rio rip rir ris rna rnb rnh rni rnn rno rnp rnr rns roa rob roe roh roi ron roo rop ror ros rpa rpb rpe rph rpi rpn rpo rpp rpr rps rra rrb rrh rri rrn rrp rrr rrs rsa rsb rse rsh rsi rsn rso rsp rsr rss saa sab sae sah sai san sao sap sar sas sba sbb sbe sbh sbi sbn sbo sbp sbr sbs se- sea seb see seh sei sen seo sep ser ses sh- sha shb she shh shi shn sho shp shr shs sia sib sie sih sii sin sio sip sir sis sna snb sne sni snn sno snp snr sns soa sob soe soh soi son soo sop sor sos spa spb spe sph spi spn spo spp spr sps sr- sra srb