-er a-a a-b aaa aab aae aaj aar aas ab- aba abb abe abj abr abs aea aeb aee aej aer aes aja ajb aje ajj ajr ajs ar- ara arb are arj arr ars as- asa asb ase asj asr ass baa bab bae baj bar bas bba bbb bbe bbr bbs be- bea beb bee ber bes bja bjj bjr bjs bra brb bre brj brr brs bsa bsb bse bsj bsr bss eaa eab eae eaj ear eas eba ebb ebe ebj ebr ebs eea eeb eee eer ees eja era erb ere err ers es- esa esb ese esr ess jaa jab jae jaj jar jas jba jbj jbr jbs jea jeb jee jej jer jes jja jjb jjj jjr jjs jra jrb jrr jrs jsa jsb jse jsj jsr jss ra- raa rab rae raj rar ras rba rbb rbe rbr rbs re- rea reb ree rer res rja rjr rra rrb rrr rrs rsa rsb rse rsj rsr rss saa sab sae saj sar sas sba sbb sbe sbj sbr sbs se- sea seb see sej ser ses sja sjb sje sjj sjr sjs sr- sra srb sre srj srr srs ss- ssa ssb sse ssj ssr sss