a-a a-b a-c aaa aab aac aah aam aan aar aas ab- aba abb abc abh abm abn abr abs ac- aca acb acc ach acm acn acr acs aha ahb ahc ahh ahm ahn ahr ahs ama amb amc amh amm amn amr ams an- ana anb anc anh anm ann anr ans ar- ara arb arc arh arm arn arr ars as- asa asb asc ash asm asn asr ass baa bab bac bah bam ban bar bas bba bbb bbc bbh bbm bbn bbr bbs bca bcb bcc bch bcm bcn bcr bcs bha bhb bhc bhh bhm bhr bhs bma bmb bmc bmh bmm bmn bmr bms bna bnb bnc bnn bnr bns bra brb brh brm brn brr brs bsa bsb bsc bsh bsm bsn bsr bss c-- caa cab cac cah cam can car cas cba cbb cbc cbh cbm cbn cbr cbs cca ccb ccc cch ccm ccn ccr ccs ch- cha chb chc chh chm chn chr chs cma cmb cmc cmh cmm cmn cmr cms cn- cna cnb cnc cnh cnm cnn cnr cns cra crb crc crh crm crn crr crs csa csb csc csh csm csn csr css haa hab hac hah ham han har has hba hbb hbc hbh hbm hbn hbr hbs hca hcb hcc hch hcm hcn hcr hcs hha hhb hhc hhh hhm hhn hhr hhs hma hmb hmc hmh hmm hmr hms hna hnb hnc hnh hnn hns hr- hra hrb hrc hrh hrm hrn hrr hrs hsa hsb hsc hsh hsm hsn hsr hss m-r maa mab mac mah mam man mar mas mba mbb mbc mbh mbm mbr mbs mc- mca mcb mcc mch mcm mcn mcr mcs mha mhc mhh mhm mhn mhr mhs mma mmb mmc mmh mmm mmn mmr mms mna mnb mnc mnm mnn mnr mns mra mrb mrc mrh mrm mrn mrr mrs msa msb msc msh msm msn msr mss naa nab nac nah nam nan nar nas nba nbb nbc nbm nbn nbr nbs nca ncb ncc nch ncm ncn ncr ncs nha nhb nhc nhh nhm nhn nhr nhs nma nmb nmc nmh nmm nmn nmr nms nna nnb nnc nnh nnm nnn nns nra nrb nrc nrm nrn nrr nrs nsa nsb nsc nsh nsm nsn nsr nss ra- raa rab rac rah ram ran rar ras rba rbb rbc rbh rbm rbn rbr rbs rca rcb rcc rch rcm rcn rcr rcs rh- rha rhb rhc rhh rhm rhn rhr rhs rma rmb rmc rmh rmm rmn rmr rms rna rnb rnc rnh rnm rnn rnr rns rra rrb rrc rrh rrm rrn rrr rrs rsa rsb rsc rsh rsm rsn rsr rss saa sab sac sah sam san sar sas sba sbb sbc sbh sbm sbn sbr sbs sca scb scc sch scm scn scr scs sh- sha shb shc shh shm shn shr shs sma smb smc smh smm smn smr sms sna snb snc snm snn snr sns sr- sra srb src srh srm srn srr srs ss- ssa ssb ssc ssh ssm ssn ssr sss