-er a-a a-b a-c aaa aab aac aae aag aah aam aan aar ab- aba abb abc abe abg abh abm abn abr ac- aca acb acc ace acg ach acm acn acr aea aeb aec aee aeg aeh aem aen aer ag- aga agb agc age agg agh agm agn agr aha ahb ahc ahe ahg ahh ahm ahn ahr ama amb amc ame amg amh amm amn amr an- ana anb anc ane ang anh anm ann anr ar- ara arb arc are arg arh arm arn arr baa bab bac bae bag bah bam ban bar bba bbb bbc bbe bbg bbh bbm bbn bbr bca bcb bcc bce bcg bch bcm bcn bcr be- bea beb bec bee beg beh bem ben ber bga bgb bgc bge bgg bgh bgm bgn bgr bha bhb bhc bhe bhg bhh bhm bhr bma bmb bmc bme bmg bmh bmm bmn bmr bna bnb bnc bne bng bnn bnr bra brb bre brg brh brm brn brr c-- caa cab cac cae cag cah cam can car cba cbb cbc cbe cbg cbh cbm cbn cbr cca ccb ccc cce ccg cch ccm ccn ccr ce- cea ceb cec cee ceg ceh cem cen cer cga cgb cgc cge cgg cgh cgm cgn cgr ch- cha chb chc che chg chh chm chn chr cma cmb cmc cme cmg cmh cmm cmn cmr cn- cna cnb cnc cne cng cnh cnm cnn cnr cra crb crc cre crg crh crm crn crr eaa eab eac eae eag eah eam ean ear eba ebb ebc ebe ebg ebh ebm ebn ebr ec- eca ecb ecc ece ecg ech ecm ecn ecr eea eeb eec eee eeg eem een eer ega egb egc ege egg egh egm egn egr eha ehb ehc ehe ehg ehh ehm ehn ehr em- ema emb emc eme emg emh emm emn emr en- ena enb enc ene eng enh enm enn enr era erb erc ere erg erh erm ern err gaa gab gac gae gag gah gam gan gar gba gbc gbe gbg gbh gbm gbn gbr gca gcb gcc gce gcg gch gcm gcn gcr ge- gea geb gec gee geg geh gem gen ger gga ggb ggc ggg ggh ggm ggn ggr gha ghb ghc ghe ghg ghh ghn ghr gma gmb gmc gme gmg gmh gmm gmn gmr gna gnb gnc gne gnm gnn gnr gra grb grc gre grg grh grm grn grr haa hab hac hae hag hah ham han har hba hbb hbc hbe hbg hbh hbm hbn hbr hca hcb hcc hce hcg hch hcm hcn hcr he- hea heb hec hee heg heh hem hen her hga hgb hgc hge hgg hgh hgm hgn hgr hha hhb hhc hhe hhg hhh hhm hhn hhr hma hmb hmc hme hmg hmh hmm hmr hna hnb hnc hne hng hnh hnn hr- hra hrb hrc hre hrg hrh hrm hrn hrr m-r maa mab mac mae mag mah mam man mar mba mbb mbc mbe mbg mbh mbm mbr mc- mca mcb mcc mce mcg mch mcm mcn mcr mea meb mec mee meg meh mem men mer mga mgb mgc mge mgh mgm mgn mgr mha mhc mhg mhh mhm mhn mhr mma mmb mmc mme mmg mmh mmm mmn mmr mna mnb mnc mne mng mnm mnn mnr mra mrb mrc mre mrg mrh mrm mrn mrr naa nab nac nae nag nah nam nan nar nba nbb nbc nbe nbg nbm nbn nbr nca ncb ncc nce ncg nch ncm ncn ncr ne- nea neb nec nee neg neh nem nen ner nga ngb ngc nge ngg ngh ngm ngn nha nhb nhc nhe nhg nhh nhm nhn nhr nma nmb nmc nme nmg nmh nmm nmn nmr nna nnb nnc nne nng nnh nnm nnn nra nrb nrc nre nrg nrm nrn nrr ra- raa rab rac rae rag rah ram ran rar rba rbb rbc rbe rbg rbh rbm rbn rbr rca rcb rcc rce rcg rch rcm rcn rcr re- rea reb rec ree reg reh rem ren rer rga rgb rgc rge rgg rgh rgn rgr rh- rha rhb rhc rhe rhg rhh rhm rhn rhr rma rmb rmc rme rmg rmh rmm rmn rmr rna rnb rnc rng rnh rnm rnn rnr rra rrb rrc rrg rrh rrm rrn rrr