-er a-a a-b a-i aaa aab aae aaf aai aar aas aau aav ab- aba abb abe abf abi abr abs abu abv aea aeb aee aef aei aer aes aeu aev af- afa afb afe aff afi afr afs afu afv ai- aia aib aie aif aii air ais aiu aiv ar- ara arb are arf ari arr ars aru arv as- asa asb ase asf asi asr ass asu asv au- aua aub aue auf aui aur aus auv av- ava avb ave avf avi avr avs avu b-u baa bab bae baf bai bar bas bau bav bba bbb bbe bbf bbi bbr bbs bbu be- bea beb bee bef bei ber bes beu bev bfa bfb bfe bff bfi bfr bfs bfu bfv bi- bia bib bie bif bii bir bis biu biv bra brb bre brf bri brr brs bru brv bsa bsb bse bsf bsi bsr bss bsu bsv bua bub bue buf bui bur bus buu bva bvb bve bvi bvr bvs bvu bvv eaa eab eae eaf eai ear eas eau eav eba ebb ebe ebf ebi ebr ebs ebu ebv eea eeb eee eef eer ees eev ef- efa efb efe eff efi efr efs eia eib eie eif eii eir eis eiu eiv era erb ere erf eri err ers eru erv es- esa esb ese esf esi esr ess esu esv eu- eua eub eue euf eui eur eus euv eva evb eve evf evi evr evs evv faa fab fae faf fai far fas fau fav fba fbb fbe fbf fbi fbr fbs fbu fea feb fee fef fei fer fes feu fev ffa ffe fff ffi ffr ffs ffu ffv fia fib fie fif fii fir fis fiu fra frb fre frf fri frr frs fru fsa fsb fse fsf fsi fsr fss fsu fsv fua fub fue fuf fui fur fus fuu fuv fva i-f i-v ia- iaa iab iae iaf iai iar ias iau iav iba ibb ibe ibf ibi ibr ibs ibu ibv ie- iea iee ief iei ier ies iev ifa ifb ife iff ifi ifr ifs ifu iia iib iie iif iii iir iis iiu ir- ira irb ire irf iri irr irs iru irv is- isa isb ise isf isi isr iss isu isv iu- iua iub iue iui iur ius iva ivb ive ivf ivi ivr ivs ivu ivv ra- raa rab rae raf rai rar ras rau rav rba rbb rbe rbf rbi rbr rbs rbu re- rea reb ree ref rei rer res reu rev rfa rfb rfe rff rfi rfr rfs rfu rfv ria rib rie rif rii rir ris riv rra rrb rrf rri rrr rrs rru rsa rsb rse rsf rsi rsr rss rsu rsv rua rub rue ruf rui rur rus ruu ruv rva rvb rve rvf rvi rvr rvs rvu rvv saa sab sae saf sai sar sas sau sav sba sbb sbe sbf sbi sbr sbs sbu sbv se- sea seb see sef sei ser ses seu sev sfa sfb sfe sff sfi sfr sfs sfu sfv sia sib sie sif sii sir sis siu siv sr- sra srb sre srf sri srr srs srv ss- ssa ssb sse ssf ssi ssr sss ssu ssv sua sub sue suf sui sur sus suu suv sva svb sve svf svi svr svs svu svv ua- uaa uab uae uaf uai uar uas uau uav uba ubb ube ubf ubi ubr ubs ubu ubv uea ueb uee uef uei uer ues ufa ufe uff ufi ufr ufs ufu ufv uia uib uie uif uii uir uis uiu ur- ura urb ure urf uri urr urs uru usa usb use usf usi usr uss usu usv uua uue uur uus uuu uva uvb uve uvf uvs uvu uvv v-a v-e vaa vab vae vai var vas vau vav vba vbi vbr vbs vbv vea veb vee vef vei ver ves veu vfa vfb vff vfi vfr vfs vfu vfv vi- via vib vie vif vii vir vis viu viv vra vrb vre vrf vri vrr vrs vru vsa vsb vse vsf vsi vsr vss vsu vsv vue vur vus vuv vva vvb vvi vvr vvs vvv