-er a-a a-b a-c aaa aab aac aae aah aan aao aap aar aas ab- aba abb abc abe abh abn abo abp abr abs ac- aca acb acc ace ach acn aco acp acr acs aea aeb aec aee aeh aen aeo aep aer aes aha ahb ahc ahe ahh ahn aho ahp ahr ahs an- ana anb anc ane anh ann ano anp anr ans aoa aob aoc aoe aoh aon aoo aop aor aos ap- apa apb apc ape aph apn apo app apr aps ar- ara arb arc are arh arn aro arp arr ars as- asa asb asc ase ash asn aso asp asr ass b-p baa bab bac bae bah ban bao bap bar bas bba bbb bbc bbe bbh bbn bbo bbp bbr bbs bca bcb bcc bce bch bcn bco bcp bcr bcs be- bea beb bec bee beh ben beo bep ber bes bha bhb bhc bhe bhh bho bhp bhr bhs bna bnb bnc bne bnn bno bnp bnr bns boa bob boc boe boh bon boo bop bor bos bpa bpb bpc bpe bph bpn bpo bpp bpr bps bra brb bre brh brn bro brp brr brs bsa bsb bsc bse bsh bsn bso bsp bsr bss c-- caa cab cac cae cah can cao cap car cas cba cbb cbc cbe cbh cbn cbo cbp cbr cbs cca ccb ccc cce cch ccn cco ccp ccr ccs ce- cea ceb cec cee ceh cen ceo cep cer ces ch- cha chb chc che chh chn cho chp chr chs cn- cna cnb cnc cne cnh cnn cno cnp cnr cns co- coa cob coc coe coh con coo cop cor cos cpa cpb cpc cpe cph cpn cpo cpp cpr cps cra crb crc cre crh crn cro crp crr crs csa csb csc cse csh csn cso csp csr css eaa eab eac eae eah ean eao eap ear eas eba ebb ebc ebe ebh ebn ebo ebp ebr ebs ec- eca ecb ecc ece ech ecn eco ecr ecs eea eeb eec eee een eeo eep eer ees eha ehb ehc ehe ehh ehn eho ehp ehr ehs en- ena enb enc ene enh enn eno enp enr ens eo- eoa eob eoc eoe eoh eon eoo eop eor eos ep- epa epb epc epe eph epn epo epp epr eps era erb erc ere erh ern ero erp err ers es- esa esb esc ese esh esn eso esp esr ess haa hab hac hae hah han hao hap har has hba hbb hbc hbe hbh hbn hbo hbp hbr hbs hca hcb hcc hce hch hcn hco hcp hcr hcs he- hea heb hec hee heh hen heo hep her hes hha hhb hhc hhe hhh hhn hho hhp hhr hhs hna hnb hnc hne hnh hnn hno hns hoa hob hoc hoe hoh hon hoo hop hor hos hpa hpb hpc hpe hph hpn hpo hpp hpr hps hr- hra hrb hrc hre hrh hrn hro hrp hrr hrs hsa hsb hsc hse hsh hsn hsp hsr hss naa nab nac nae nah nan nao nap nar nas nba nbb nbc nbe nbn nbo nbp nbr nbs nca ncb ncc nce nch ncn nco ncp ncr ncs ne- nea neb nec nee neh nen neo nep ner nes nha nhb nhc nhe nhh nhn nhp nhr nhs nna nnb nnc nne nnh nnn nno nnp nns no- noa nob noc noe noh non noo nop nor nos npa npb npc npe nph npn npo npp npr nps nra nrb nrc nre nrn nro nrp nrr nrs nsa nsb nsc nse nsh nsn nso nsp nsr nss oaa oab oac oae oah oan oao oap oar oas ob- oba obb obc obe obh obn obo obp obr obs oc- oca ocb occ och ocn oco ocp ocr ocs oea oeb oec oee oeh oen oeo oep oer oes oha ohc ohe ohh ohn oho ohp ohr ohs on- ona onb onc one onh onn ono onp onr ons oo- ooa oob ooc ooh oon ooo oop oor oos op- opa opb opc ope oph opn opo opp opr ops or- ora orb orc ore orh orn oro orp orr ors os- osa osb osc ose osh osn oso osp osr oss p-p paa pab pac pae pah pan pao pap par pas pba pbb pbc pbe pbn pbo pbp pbr pbs pca pcb pcc pce pch pcn pco pcp pcr pcs pea peb pec pee peh pen peo pep per pes pha phb phc phe phn pho php phr phs pn- pna pnb pnc pne pnh pnn pno pnp pnr pns poa pob poc poe poh pon poo pop por pos ppa ppb ppc ppe pph ppn ppo ppp ppr pps pra prb prc pre prh prn pro prp prr prs ps- psa psb psc pse psh psn pso psp psr pss ra- raa rab rac rae rah ran rao rap rar ras rba rbb rbc rbe rbh rbn rbo rbp rbr rbs rca rcb rcc rce rch rcn rco rcp rcr rcs re- rea reb rec ree reh ren reo rep rer res rh- rha rhb rhc rhe rhh rhn rho rhp rhr rhs rna rnb rnc rnh rnn rno rnp rnr rns roa rob roc roe roh ron roo rop ror ros rpa rpb rpc rpe rph rpn rpo rpp rpr rps rra rrb rrc rrh rrn rrp rrr rrs rsa rsb rsc rse rsh rsn rso rsp rsr rss saa sab sac sae sah san sao sap sar sas sba sbb sbc sbe sbh sbn sbo sbp sbr sbs sca scb scc sce sch scn sco scp scr scs se- sea seb sec see seh sen seo sep ser ses sh- sha shb shc she shh shn sho shp shr shs sna snb snc sne snn sno snp snr sns soa sob soc soe soh son soo sop sor sos spa spb spc spe sph spn spo spp spr sps