a-a a-b aaa aab aae aag aah aan aas ab- aba abb abe abg abh abn abs aea aeb aee aeg aeh aen aes ag- aga agb age agg agh agn ags aha ahb ahe ahg ahh ahn ahs an- ana anb ane ang anh ann ans as- asa asb ase asg ash asn ass baa bab bae bag bah ban bas bba bbb bbe bbg bbh bbn bbs be- bea beb bee beg beh ben bes bga bgb bge bgg bgh bgn bgs bha bhb bhe bhg bhh bhs bna bnb bne bng bnn bns bsa bsb bse bsg bsh bsn bss eaa eab eae eag eah ean eas eba ebb ebe ebg ebh ebn ebs eea eeb eee eeg een ees ega egb ege egg egh egn egs eha ehb ehe ehg ehh ehn ehs en- ena enb ene eng enh enn ens es- esa esb ese esg esh esn ess gaa gab gae gag gah gan gas gba gbe gbg gbh gbn gbs ge- gea geb gee geg geh gen ges gga ggb ggg ggh ggn ggs gha ghb ghe ghg ghh ghn ghs gna gnb gne gnn gns gsa gsb gse gsg gsn gss haa hab hae hag hah han has hba hbb hbe hbg hbh hbn hbs he- hea heb hee heg heh hen hes hga hgb hge hgg hgh hgn hgs hha hhb hhe hhg hhh hhn hhs hna hnb hne hng hnh hnn hns hsa hsb hse hsg hsh hsn hss naa nab nae nag nah nan nas nba nbb nbe nbg nbn nbs ne- nea neb nee neg neh nen nes nga ngb nge ngg ngh ngn ngs nha nhb nhe nhg nhh nhn nhs nna nnb nne nng nnh nnn nns nsa nsb nse nsg nsh nsn nss saa sab sae sag sah san sas sba sbb sbe sbg sbh sbn sbs se- sea seb see seg seh sen ses sga sgb sge sgg sgh sgn sgs sh- sha shb she shg shh shn shs sna snb sne sng snn sns ss- ssa ssb sse ssg ssh ssn sss