-al -ol a-a a-b a-i aaa aab aae aaf aai aal aao aas ab- aba abb abe abf abi abl abo abs aea aeb aee aef aei ael aeo aes af- afa afb afe aff afi afl afo afs ai- aia aib aie aif aii ail aio ais al- ala alb ale alf ali all alo als aoa aob aoe aof aoi aol aoo aos as- asa asb ase asf asi asl aso ass baa bab bae baf bai bal bao bas bba bbb bbe bbf bbi bbl bbo bbs be- bea beb bee bef bei bel beo bes bfa bfb bfe bff bfi bfl bfo bfs bi- bia bib bie bif bii bil bio bis bla blb ble blf bli bll blo bls boa bob boe bof boi bol boo bos bsa bsb bse bsf bsi bsl bso bss eaa eab eae eaf eai eal eao eas eba ebb ebe ebf ebi ebl ebo ebs eea eeb eee eef eel eeo ees ef- efa efb efe eff efi efl efo efs eia eib eie eif eii eil eio eis ela elb ele elf eli ell elo els eo- eoa eob eoe eof eoi eol eoo eos es- esa esb ese esf esi esl eso ess faa fab fae faf fai fal fao fas fba fbb fbe fbf fbi fbl fbo fbs fea feb fee fef fei fel feo fes ffa ffe fff ffi ffl ffo ffs fia fib fie fif fii fil fis fla flb fle flf fli fll flo fls foa fob foe fof foi fol foo fos fsa fsb fse fsf fsi fsl fso fss i-f ia- iaa iab iae iaf iai ial iao ias iba ibb ibe ibf ibi ibl ibo ibs ie- iea iee ief iei iel ies ifa ifb ife iff ifi ifl ifo ifs iia iib iie iif iii iil iio iis il- ila ilb ile ilf ili ill ilo ils io- ioa iob ioe iof ioi iol ioo ios is- isa isb ise isf isi isl iso iss la- laa lab lae laf lai lal lao las lba lbb lbe lbf lbi lbl lbo lbs lea leb lee lef lei lel leo les lfa lfb lfe lff lfi lfl lfo lfs lia lib lie lif lii lil lio lis lla llb lle llf lli lll llo lls loa lob loe lof loi lol loo los lsa lsb lse lsf lsi lsl lso lss o-i oaa oab oae oaf oai oal oao oas ob- oba obb obe obf obi obl obo obs oea oeb oee oef oei oel oeo oes of- ofa ofb ofe off ofi ofl ofo ofs oia oib oie oif oii oil oio ois ola olb ole olf oli oll olo ols oo- ooa oob oof ooi ool ooo oos os- osa osb ose osf osi osl oso oss saa sab sae saf sai sal sao sas sba sbb sbe sbf sbi sbl sbo sbs se- sea seb see sef sei sel seo ses sfa sfb sfe sff sfi sfl sfo sfs sia sib sie sif sii sil sio sis sla slb sle slf sli sll slo sls soa sob soe sof soi sol soo sos ss- ssa ssb sse ssf ssi ssl sso sss