a-a a-b a-c aaa aab aac aah aam aan aao aas ab- aba abb abc abh abm abn abo abs ac- aca acb acc ach acm acn aco acs aha ahb ahc ahh ahm ahn aho ahs ama amb amc amh amm amn amo ams an- ana anb anc anh anm ann ano ans aoa aob aoc aoh aom aon aoo aos as- asa asb asc ash asm asn aso ass baa bab bac bah bam ban bao bas bba bbb bbc bbh bbm bbn bbo bbs bca bcb bcc bch bcm bcn bco bcs bha bhb bhc bhh bhm bho bhs bma bmb bmc bmh bmm bmn bmo bms bna bnb bnc bnn bno bns boa bob boc boh bom bon boo bos bsa bsb bsc bsh bsm bsn bso bss c-- caa cab cac cah cam can cao cas cba cbb cbc cbh cbm cbn cbo cbs cca ccb ccc cch ccm ccn cco ccs ch- cha chb chc chh chm chn cho chs cma cmb cmc cmh cmm cmn cmo cms cn- cna cnb cnc cnh cnm cnn cno cns co- coa cob coc coh com con coo cos csa csb csc csh csm csn cso css haa hab hac hah ham han hao has hba hbb hbc hbh hbm hbn hbo hbs hca hcb hcc hch hcm hcn hco hcs hha hhb hhc hhh hhm hhn hho hhs hma hmb hmc hmh hmm hmo hms hna hnb hnc hnh hnn hno hns hoa hob hoc hoh hom hon hoo hos hsa hsb hsc hsh hsm hsn hss m-o maa mab mac mah mam man mao mas mba mbb mbc mbh mbm mbo mbs mc- mca mcb mcc mch mcm mcn mco mcs mha mhc mhh mhm mhn mho mhs mma mmb mmc mmh mmm mmn mmo mms mna mnb mnc mnm mnn mno mns moa mob moc moh mom mon moo mos msa msb msc msh msm msn mso mss naa nab nac nah nam nan nao nas nba nbb nbc nbm nbn nbo nbs nca ncb ncc nch ncm ncn nco ncs nha nhb nhc nhh nhm nhn nhs nma nmb nmc nmh nmm nmn nmo nms nna nnb nnc nnh nnm nnn nno nns no- noa nob noc noh nom non noo nos nsa nsb nsc nsh nsm nsn nso nss oaa oab oac oah oam oan oao oas ob- oba obb obc obh obm obn obo obs oc- oca ocb occ och ocm ocn oco ocs oha ohc ohh ohm ohn oho ohs om- oma omb omc omh omm omn omo oms on- ona onb onc onh onn ono ons oo- ooa oob ooc ooh oom oon ooo oos os- osa osb osc osh osm osn oso oss saa sab sac sah sam san sao sas sba sbb sbc sbh sbm sbn sbo sbs sca scb scc sch scm scn sco scs sh- sha shb shc shh shm shn sho shs sma smb smc smh smm smn smo sms sna snb snc snm snn sno sns soa sob soc soh som son soo sos ss- ssa ssb ssc ssh ssm ssn sso sss