-er a-a a-b a-c aaa aab aac aae aah aap aar aas ab- aba abb abc abe abh abp abr abs ac- aca acb acc ace ach acp acr acs aea aeb aec aee aeh aep aer aes aha ahb ahc ahe ahh ahp ahr ahs ap- apa apb apc ape aph app apr aps ar- ara arb arc are arh arp arr ars as- asa asb asc ase ash asp asr ass b-p baa bab bac bae bah bap bar bas bba bbb bbc bbe bbh bbp bbr bbs bca bcb bcc bce bch bcp bcr bcs be- bea beb bec bee beh bep ber bes bha bhb bhc bhe bhh bhp bhr bhs bpa bpb bpc bpe bph bpp bpr bps bra brb bre brh brp brr brs bsa bsb bsc bse bsh bsp bsr bss c-- caa cab cac cae cah cap car cas cba cbb cbc cbe cbh cbp cbr cbs cca ccb ccc cce cch ccp ccr ccs ce- cea ceb cec cee ceh cep cer ces ch- cha chb chc che chh chp chr chs cpa cpb cpc cpe cph cpp cpr cps cra crb crc cre crh crp crr crs csa csb csc cse csh csp csr css eaa eab eac eae eah eap ear eas eba ebb ebc ebe ebh ebp ebr ebs ec- eca ecb ecc ece ech ecr ecs eea eeb eec eee eep eer ees eha ehb ehc ehe ehh ehp ehr ehs ep- epa epb epc epe eph epp epr eps era erb erc ere erh erp err ers es- esa esb esc ese esh esp esr ess haa hab hac hae hah hap har has hba hbb hbc hbe hbh hbp hbr hbs hca hcb hcc hce hch hcp hcr hcs he- hea heb hec hee heh hep her hes hha hhb hhc hhe hhh hhp hhr hhs hpa hpb hpc hpe hph hpp hpr hps hr- hra hrb hrc hre hrh hrp hrr hrs hsa hsb hsc hse hsh hsp hsr hss p-p paa pab pac pae pah pap par pas pba pbb pbc pbe pbp pbr pbs pca pcb pcc pce pch pcp pcr pcs pea peb pec pee peh pep per pes pha phb phc phe php phr phs ppa ppb ppc ppe pph ppp ppr pps pra prb prc pre prh prp prr prs ps- psa psb psc pse psh psp psr pss ra- raa rab rac rae rah rap rar ras rba rbb rbc rbe rbh rbp rbr rbs rca rcb rcc rce rch rcp rcr rcs re- rea reb rec ree reh rep rer res rh- rha rhb rhc rhe rhh rhp rhr rhs rpa rpb rpc rpe rph rpp rpr rps rra rrb rrc rrh rrp rrr rrs rsa rsb rsc rse rsh rsp rsr rss saa sab sac sae sah sap sar sas sba sbb sbc sbe sbh sbp sbr sbs sca scb scc sce sch scp scr scs se- sea seb sec see seh sep ser ses sh- sha shb shc she shh shp shr shs spa spb spc spe sph spp spr sps sr- sra srb src sre srh srp srr srs ss- ssa ssb ssc sse ssh ssp ssr sss