-er a-a a-b a-c aaa aab aac aae aah aam aap aar ab- aba abb abc abe abh abm abp abr ac- aca acb acc ace ach acm acp acr aea aeb aec aee aeh aem aep aer aha ahb ahc ahe ahh ahm ahp ahr ama amb amc ame amh amm amp amr ap- apa apb apc ape aph apm app apr ar- ara arb arc are arh arm arp arr b-p baa bab bac bae bah bam bap bar bba bbb bbc bbe bbh bbm bbp bbr bca bcb bcc bce bch bcm bcp bcr be- bea beb bec bee beh bem bep ber bha bhb bhc bhe bhh bhm bhp bhr bma bmb bmc bme bmh bmm bmp bmr bpa bpb bpc bpe bph bpm bpp bpr bra brb bre brh brm brp brr c-- caa cab cac cae cah cam cap car cba cbb cbc cbe cbh cbm cbp cbr cca ccb ccc cce cch ccm ccp ccr ce- cea ceb cec cee ceh cem cep cer ch- cha chb chc che chh chm chp chr cma cmb cmc cme cmh cmm cmp cmr cpa cpb cpc cpe cph cpm cpp cpr cra crb crc cre crh crm crp crr eaa eab eac eae eah eam eap ear eba ebb ebc ebe ebh ebm ebp ebr ec- eca ecb ecc ece ech ecm ecr eea eeb eec eee eem eep eer eha ehb ehc ehe ehh ehm ehp ehr em- ema emb emc eme emh emm emp emr ep- epa epb epc epe eph epm epp epr era erb erc ere erh erm erp err haa hab hac hae hah ham hap har hba hbb hbc hbe hbh hbm hbp hbr hca hcb hcc hce hch hcm hcp hcr he- hea heb hec hee heh hem hep her hha hhb hhc hhe hhh hhm hhp hhr hma hmb hmc hme hmh hmm hmp hmr hpa hpb hpc hpe hph hpm hpp hpr hr- hra hrb hrc hre hrh hrm hrp hrr m-r maa mab mac mae mah mam map mar mba mbb mbc mbe mbh mbm mbp mbr mc- mca mcb mcc mce mch mcm mcp mcr mea meb mec mee meh mem mep mer mha mhc mhh mhm mhp mhr mma mmb mmc mme mmh mmm mmp mmr mpa mpb mpc mpe mph mpm mpp mpr mra mrb mrc mre mrh mrm mrp mrr p-p paa pab pac pae pah pam pap par pba pbb pbc pbe pbm pbp pbr pca pcb pcc pce pch pcm pcp pcr pea peb pec pee peh pem pep per pha phb phc phe phm php phr pma pmb pmc pme pmh pmm pmp pmr ppa ppb ppc ppe pph ppm ppp ppr pra prb prc pre prh prm prp prr ra- raa rab rac rae rah ram rap rar rba rbb rbc rbe rbh rbm rbp rbr rca rcb rcc rce rch rcm rcp rcr re- rea reb rec ree reh rem rep rer rh- rha rhb rhc rhe rhh rhm rhp rhr rma rmb rmc rme rmh rmm rmp rmr rpa rpb rpc rpe rph rpm rpp rpr rra rrb rrc rrh rrm rrp rrr