a-a a-b aaa aab aae aag aaj aan aao aas ab- aba abb abe abg abj abn abo abs aea aeb aee aeg aej aen aeo aes ag- aga agb age agg agj agn ago ags aja ajb aje ajj ajn ajo ajs an- ana anb ane ang anj ann ano ans aoa aob aoe aog aoj aon aoo aos as- asa asb ase asg asj asn aso ass baa bab bae bag baj ban bao bas bba bbb bbe bbg bbn bbo bbs be- bea beb bee beg ben beo bes bga bgb bge bgg bgn bgo bgs bja bjg bjj bjn bjs bna bnb bne bng bnj bnn bno bns boa bob boe bog boj bon boo bos bsa bsb bse bsg bsj bsn bso bss eaa eab eae eag eaj ean eao eas eba ebb ebe ebg ebj ebn ebo ebs eea eeb eee eeg een eeo ees ega egb ege egg egn ego egs eja ejo en- ena enb ene eng enn eno ens eo- eoa eob eoe eog eon eoo eos es- esa esb ese esg esn eso ess gaa gab gae gag gaj gan gao gas gba gbe gbg gbj gbn gbo gbs ge- gea geb gee geg gen geo ges gga ggb ggg ggj ggn ggo ggs gja gje gjg gna gnb gne gnn gno gns goa gob goe gog gon goo gos gsa gsb gse gsg gsj gsn gso gss jaa jab jae jag jaj jan jao jas jba jbg jbj jbo jbs jea jeb jee jeg jej jen jeo jes jga jgb jge jgn jgo jgs jja jjb jjg jjj jjs jna jne jng jnj jnn jno jns joa job joe jog joj jon joo jos jsa jsb jse jsg jsj jsn jso jss naa nab nae nag naj nan nao nas nba nbb nbe nbg nbn nbo nbs ne- nea neb nee neg nej nen neo nes nga ngb nge ngg ngj ngn ngo ngs nja nje njn njs nna nnb nne nng nnn nno nns no- noa nob noe nog noj non noo nos nsa nsb nse nsg nsn nso nss oaa oab oae oag oaj oan oao oas ob- oba obb obe obg obj obn obo obs oea oeb oee oeg oen oeo oes oga oge ogg ogn ogo ogs oja ojb oje ojo ojs on- ona onb one ong onj onn ono ons oo- ooa oob oog oon ooo oos os- osa osb ose osg osj osn oso oss saa sab sae sag saj san sao sas sba sbb sbe sbg sbj sbn sbo sbs se- sea seb see seg sej sen seo ses sga sgb sge sgg sgn sgo sgs sja sjb sje sjj sjs sna snb sne sng snj snn sno sns soa sob soe sog soj son soo sos ss- ssa ssb sse ssg ssj ssn sso sss