-al -er -ol a-a a-b a-c aaa aab aac aad aae aaf aal aao aar aas aau ab- aba abb abc abd abe abf abl abo abr abs abu ac- aca acb acc acd ace acf acl aco acr acs acu ad- ada adb adc add ade adf adl ado adr ads adu aea aeb aec aed aee aef ael aeo aer aes aeu af- afa afb afc afd afe aff afl afo afr afs afu al- ala alb alc ald ale alf all alo alr als alu aoa aob aoc aod aoe aof aol aoo aor aos aou ar- ara arb arc ard are arf arl aro arr ars aru as- asa asb asc asd ase asf asl aso asr ass asu au- aua aub auc aud aue auf aul auo aur aus b-u baa bab bac bad bae baf bal bao bar bas bau bba bbb bbc bbd bbe bbf bbl bbo bbr bbs bbu bca bcb bcc bcd bce bcf bcl bco bcr bcs bcu bda bdb bdc bdd bde bdf bdl bdo bdr bds bdu be- bea beb bec bed bee bef bel beo ber bes beu bfa bfb bfc bfd bfe bff bfl bfo bfr bfs bfu bla blb blc bld ble blf bll blo blr bls blu boa bob boc bod boe bof bol boo bor bos bou bra brb brd bre brf brl bro brr brs bru bsa bsb bsc bsd bse bsf bsl bso bsr bss bsu bua bub buc bud bue buf bul buo bur bus buu c-- caa cab cac cad cae caf cal cao car cas cau cba cbb cbc cbd cbe cbf cbl cbo cbr cbs cbu cca ccb ccc ccd cce ccf ccl cco ccr ccs ccu cda cdb cdc cdd cde cdf cdl cdo cdr cds cdu ce- cea ceb cec ced cee cef cel ceo cer ces ceu cfa cfb cfc cfd cfe cff cfl cfo cfr cfs cfu cl- cla clb clc cld cle clf cll clo clr cls clu co- coa cob coc cod coe cof col coo cor cos cou cra crb crc crd cre crf crl cro crr crs cru csa csb csc csd cse csf csl cso csr css csu cua cub cuc cud cue cuf cul cuo cur cus cuu daa dab dac dad dae daf dal dao dar das dau dba dbb dbc dbd dbe dbf dbl dbo dbr dbs dbu dca dcb dcc dcd dce dcf dcl dco dcr dcs dcu dda ddb ddc ddd dde ddf ddl ddo ddr dds ddu de- dea deb dec ded dee def del deo der des deu dfa dfb dfc dfd dfe dff dfl dfo dfr dfs dfu dl- dla dlb dlc dld dle dlf dll dlo dlr dls dlu doa dob doc dod doe dof dol doo dor dos dou dra drb drc drd dre drl dro drr drs dru dsa dsb dsc dsd dse dsf dsl dso dsr dss dsu dua dub duc dud due duf dul duo dur dus eaa eab eac ead eae eaf eal eao ear eas eau eba ebb ebc ebd ebe ebf ebl ebo ebr ebs ebu ec- eca ecb ecc ecd ece ecf ecl eco ecr ecs ecu ed- eda edb edc edd ede edf edl edo edr eds edu eea eeb eec eed eee eef eel eeo eer ees ef- efa efb efc efd efe eff efl efo efr efs ela elb elc eld ele elf ell elo elr els elu eo- eoa eob eoc eod eoe eof eol eoo eor eos eou era erb erc erd ere erf erl ero err ers eru es- esa esb esc esd ese esf esl eso esr ess esu eu- eua eub euc eud eue euf eul eur eus faa fab fac fad fae faf fal fao far fas fau fba fbb fbc fbd fbe fbf fbl fbo fbr fbs fbu fca fcb fcc fcd fce fcf fcl fco fcr fcs fcu fda fdb fdc fdd fde fdf fdl fdo fdr fds fdu fea feb fec fed fee fef fel feo fer fes feu ffa ffc ffd ffe fff ffl ffo ffr ffs ffu fla flb flc fld fle flf fll flo flr fls flu foa fob foc foe fof fol foo for fos fou fra frb frc frd fre frf frl fro frr frs fru fsa fsb fsc fsd fse fsf fsl fso fsr fss fsu fua fub fud fue fuf ful fuo fur fus fuu la- laa lab lac lad lae laf lal lao lar las lau lba lbb lbc lbd lbe lbf lbl lbo lbr lbs lbu lca lcb lcc lcd lce lcf lcl lco lcr lcs lcu lda ldb ldc ldd lde ldf ldl ldo ldr lds ldu lea leb lec led lee lef lel leo ler les leu lfa lfb lfc lfd lfe lff lfl lfo lfr lfs lfu lla llb llc lld lle llf lll llo llr lls llu loa lob loc lod loe lof lol loo lor los lou lra lrb lrc lrd lrf lro lrr lrs lru lsa lsb lsc lsd lse lsf lsl lso lsr lss lsu lua lub luc lud lue luf lul luo lur lus luu oaa oab oac oad oae oaf oal oao oar oas oau ob- oba obb obc obd obe obf obl obo obr obs obu oc- oca ocb occ ocd ocf ocl oco ocr ocs ocu oda odb odc odd ode odf odl odo odr ods odu oea oeb oec oed oee oef oel oeo oer oes of- ofa ofb ofc ofd ofe off ofl ofo ofr ofs ofu ola olb olc old ole olf oll olo ols olu oo- ooa oob ooc ood oof ool ooo oor oos or- ora orb orc ord ore orf orl oro orr ors oru os- osa osb osc osd ose osf osl oso osr oss osu ou- oua ouc oud oue ouf oul ouo our ous ra- raa rab rac rad rae raf ral rao rar ras rau rba rbb rbc rbd