-er a-a a-b a-i aaa aab aae aah aai aan aap aar ab- aba abb abe abh abi abn abp abr aea aeb aee aeh aei aen aep aer aha ahb ahe ahh ahi ahn ahp ahr ai- aia aib aie aih aii ain aip air an- ana anb ane anh ani ann anp anr ap- apa apb ape aph api apn app apr ar- ara arb are arh ari arn arp arr b-p baa bab bae bah bai ban bap bar bba bbb bbe bbh bbi bbn bbp bbr be- bea beb bee beh bei ben bep ber bha bhb bhe bhh bhi bhp bhr bi- bia bib bie bih bii bin bip bir bna bnb bne bni bnn bnp bnr bpa bpb bpe bph bpi bpn bpp bpr bra brb bre brh bri brn brp brr eaa eab eae eah eai ean eap ear eba ebb ebe ebh ebi ebn ebp ebr eea eeb eee een eep eer eha ehb ehe ehh ehi ehn ehp ehr eia eib eie eii ein eip eir en- ena enb ene enh eni enn enp enr ep- epa epb epe eph epi epn epp epr era erb ere erh eri ern erp err h-i haa hab hae hah hai han hap har hba hbb hbe hbh hbi hbn hbp hbr he- hea heb hee heh hei hen hep her hha hhb hhe hhh hhi hhn hhp hhr hia hib hie hih hii hin hip hir hna hnb hne hnh hnn hpa hpb hpe hph hpi hpn hpp hpr hr- hra hrb hre hrh hri hrn hrp hrr ia- iaa iab iae iah iai ian iap iar iba ibb ibe ibh ibi ibn ibp ibr ie- iea iee iei ien iep ier iha ihb ihe ihh ihi ihn ihp ihr iia iib iie iih iii iin iip iir in- ina inb ine inh ini inn inp inr ipa ipb ipe ipi ipn ipp ipr ir- ira irb ire iri irn irp irr n-i naa nab nae nah nai nan nap nar nba nbb nbe nbi nbn nbp nbr ne- nea neb nee neh nei nen nep ner nha nhb nhe nhh nhi nhn nhp nhr nia nib nie nih nii nin nip nir nna nnb nne nnh nni nnn nnp npa npb npe nph npi npn npp npr nra nrb nre nri nrn nrp nrr p-p paa pab pae pah pai pan pap par pba pbb pbe pbi pbn pbp pbr pea peb pee peh pei pen pep per pha phb phe phi phn php phr pia pib pie pih pii pin pip pir pn- pna pnb pne pnh pni pnn pnp pnr ppa ppb ppe pph ppi ppn ppp ppr pra prb pre prh pri prn prp prr ra- raa rab rae rah rai ran rap rar rba rbb rbe rbh rbi rbn rbp rbr re- rea reb ree reh rei ren rep rer rh- rha rhb rhe rhh rhi rhn rhp rhr ria rib rie rih rii rin rip rir rna rnb rnh rni rnn rnp rnr rpa rpb rpe rph rpi rpn rpp rpr rra rrb rrh rri rrn rrp rrr