-er a-a a-b aaa aab aae aah aan aap aar ab- aba abb abe abh abn abp abr aea aeb aee aeh aen aep aer aha ahb ahe ahh ahn ahp ahr an- ana anb ane anh ann anp anr ap- apa apb ape aph apn app apr ar- ara arb are arh arn arp arr b-p baa bab bae bah ban bap bar bba bbb bbe bbh bbn bbp bbr be- bea beb bee beh ben bep ber bha bhb bhe bhh bhp bhr bna bnb bne bnn bnp bnr bpa bpb bpe bph bpn bpp bpr bra brb bre brh brn brp brr eaa eab eae eah ean eap ear eba ebb ebe ebh ebn ebp ebr eea eeb eee een eep eer eha ehb ehe ehh ehn ehp ehr en- ena enb ene enh enn enp enr ep- epa epb epe eph epn epp epr era erb ere erh ern erp err haa hab hae hah han hap har hba hbb hbe hbh hbn hbp hbr he- hea heb hee heh hen hep her hha hhb hhe hhh hhn hhp hhr hna hnb hne hnh hnn hpa hpb hpe hph hpn hpp hpr hr- hra hrb hre hrh hrn hrp hrr naa nab nae nah nan nap nar nba nbb nbe nbn nbp nbr ne- nea neb nee neh nen nep ner nha nhb nhe nhh nhn nhp nhr nna nnb nne nnh nnn nnp npa npb npe nph npn npp npr nra nrb nre nrn nrp nrr p-p paa pab pae pah pan pap par pba pbb pbe pbn pbp pbr pea peb pee peh pen pep per pha phb phe phn php phr pn- pna pnb pne pnh pnn pnp pnr ppa ppb ppe pph ppn ppp ppr pra prb pre prh prn prp prr ra- raa rab rae rah ran rap rar rba rbb rbe rbh rbn rbp rbr re- rea reb ree reh ren rep rer rh- rha rhb rhe rhh rhn rhp rhr rna rnb rnh rnn rnp rnr rpa rpb rpe rph rpn rpp rpr rra rrb rrh rrn rrp rrr