-er a-a a-b aaa aab aae aak aar aas aaw ab- aba abb abe abk abr abs abw aea aeb aee aek aer aes aew aka akb ake akk akr aks akw ar- ara arb are ark arr ars arw as- asa asb ase ask asr ass asw aw- awa awb awe awk awr aws aww baa bab bae bak bar bas baw bba bbb bbe bbk bbr bbs bbw be- bea beb bee bek ber bes bew bka bkb bke bkk bkr bks bkw bra brb bre brk brr brs brw bsa bsb bse bsk bsr bss bsw bwa bwb bwk bwr bws eaa eab eae eak ear eas eaw eba ebb ebe ebk ebr ebs ebw eea eeb eee eek eer ees eew eka ekb eke ekr eks era erb ere erk err ers erw es- esa esb ese esk esr ess esw ewa ewb ewe ewk ewr ews eww ka- kaa kab kae kak kar kas kaw kba kbb kbe kbk kbr kbs kbw ke- kea keb kee kek ker kes kew kkb kke kkk kkr kks kra krk krr krs krw ksa ksb kse ksk ksr kss ksw kw- kwa kwk kws kww ra- raa rab rae rak rar ras raw rba rbb rbe rbk rbr rbs rbw re- rea reb ree rek rer res rew rkb rke rkk rks rra rrb rrk rrr rrs rsa rsb rse rsk rsr rss rsw rwa rwb rwe rwr rws saa sab sae sak sar sas saw sba sbb sbe sbk sbr sbs sbw se- sea seb see sek ser ses sew sk- ska skb ske skk skr sks skw sr- sra srb sre srk srr srs srw ss- ssa ssb sse ssk ssr sss ssw swa swb swe swk swr sws waa wab wae wak war was waw wba wbb wbe wbr wbs wbw wea web wee wek wer wes wew wka wkb wke wkr wks wkw wr- wra wre wrk wrr wrs wrw wsa wsb wse wsk wsr wss wsw wwa wwe www