-er a-a a-b aaa aab aae aah aar aas aau aax ab- aba abb abe abh abr abs abu abx aea aeb aee aeh aer aes aeu aex aha ahb ahe ahh ahr ahs ahu ahx ar- ara arb are arh arr ars aru arx as- asa asb ase ash asr ass asu asx au- aua aub aue auh aur aus aux ax- axa axe axh axr axs axx b-u baa bab bae bah bar bas bau bax bba bbb bbe bbh bbr bbs bbu bbx be- bea beb bee beh ber bes beu bex bha bhb bhe bhh bhr bhs bhu bhx bra brb bre brh brr brs bru brx bsa bsb bse bsh bsr bss bsu bsx bua bub bue buh bur bus buu bux bxb bxx eaa eab eae eah ear eas eau eax eba ebb ebe ebh ebr ebs ebu ebx eea eeb eee eer ees eex eha ehb ehe ehh ehr ehs ehu era erb ere erh err ers eru es- esa esb ese esh esr ess esu esx eu- eua eub eue eur eus eux ex- exa exe exh exr exs exu exx haa hab hae hah har has hau hax hba hbb hbe hbh hbr hbs hbu hbx he- hea heb hee heh her hes heu hex hha hhb hhe hhh hhr hhs hhu hr- hra hrb hre hrh hrr hrs hru hsa hsb hse hsh hsr hss hsu hsx hua hub hue huh hur hus huu hux ra- raa rab rae rah rar ras rau rax rba rbb rbe rbh rbr rbs rbu rbx re- rea reb ree reh rer res reu rex rh- rha rhb rhe rhh rhr rhs rhu rra rrb rrh rrr rrs rru rsa rsb rse rsh rsr rss rsu rsx rua rub rue ruh rur rus ruu rux rxr rxs saa sab sae sah sar sas sau sax sba sbb sbe sbh sbr sbs sbu sbx se- sea seb see seh ser ses seu sex sh- sha shb she shh shr shs shu sr- sra srb sre srh srr srs srx ss- ssa ssb sse ssh ssr sss ssu ssx sua sub sue suh sur sus suu sux sxs sxu ua- uaa uab uae uah uar uas uau uba ubb ube ubh ubr ubs ubu ubx uea ueb uee ueh uer ues uha uhb uhe uhh uhr uhs uhu ur- ura urb ure urr urs uru urx usa usb use ush usr uss usu usx uua uue uur uus uuu uxb uxr uxu xaa xar xas xau xbe xbr xbx xee xer xes xeu xex xrx xsa xsb xss xue xus xxx