-al -ol a-a a-b a-c aaa aab aac aad aae aaf aal aao aas aau ab- aba abb abc abd abe abf abl abo abs abu ac- aca acb acc acd ace acf acl aco acs acu ad- ada adb adc add ade adf adl ado ads adu aea aeb aec aed aee aef ael aeo aes aeu af- afa afb afc afd afe aff afl afo afs afu al- ala alb alc ald ale alf all alo als alu aoa aob aoc aod aoe aof aol aoo aos aou as- asa asb asc asd ase asf asl aso ass asu au- aua aub auc aud aue auf aul auo aus b-u baa bab bac bad bae baf bal bao bas bau bba bbb bbc bbd bbe bbf bbl bbo bbs bbu bca bcb bcc bcd bce bcf bcl bco bcs bcu bda bdb bdc bdd bde bdf bdl bdo bds bdu be- bea beb bec bed bee bef bel beo bes beu bfa bfb bfc bfd bfe bff bfl bfo bfs bfu bla blb blc bld ble blf bll blo bls blu boa bob boc bod boe bof bol boo bos bou bsa bsb bsc bsd bse bsf bsl bso bss bsu bua bub buc bud bue buf bul buo bus buu c-- caa cab cac cad cae caf cal cao cas cau cba cbb cbc cbd cbe cbf cbl cbo cbs cbu cca ccb ccc ccd cce ccf ccl cco ccs ccu cda cdb cdc cdd cde cdf cdl cdo cds cdu ce- cea ceb cec ced cee cef cel ceo ces ceu cfa cfb cfc cfd cfe cff cfl cfo cfs cfu cl- cla clb clc cld cle clf cll clo cls clu co- coa cob coc cod coe cof col coo cos cou csa csb csc csd cse csf csl cso css csu cua cub cuc cud cue cuf cul cuo cus cuu daa dab dac dad dae daf dal dao das dau dba dbb dbc dbd dbe dbf dbl dbo dbs dbu dca dcb dcc dcd dce dcf dcl dco dcs dcu dda ddb ddc ddd dde ddf ddl ddo dds ddu de- dea deb dec ded dee def del deo des deu dfa dfb dfc dfd dfe dff dfl dfo dfs dfu dl- dla dlb dlc dld dle dlf dll dlo dls dlu doa dob doc dod doe dof dol doo dos dou dsa dsb dsc dsd dse dsf dsl dso dss dsu dua dub duc dud due duf dul duo dus eaa eab eac ead eae eaf eal eao eas eau eba ebb ebc ebd ebe ebf ebl ebo ebs ebu ec- eca ecb ecc ecd ece ecf ecl eco ecs ecu ed- eda edb edc edd ede edf edl edo eds edu eea eeb eec eed eee eef eel eeo ees ef- efa efb efc efd efe eff efl efo efs ela elb elc eld ele elf ell elo els elu eo- eoa eob eoc eod eoe eof eol eoo eos eou es- esa esb esc esd ese esf esl eso ess esu eu- eua eub euc eud eue euf eul eus faa fab fac fad fae faf fal fao fas fau fba fbb fbc fbd fbe fbf fbl fbo fbs fbu fca fcb fcc fcd fce fcf fcl fco fcs fcu fda fdb fdc fdd fde fdf fdl fdo fds fdu fea feb fec fed fee fef fel feo fes feu ffa ffc ffd ffe fff ffl ffo ffs ffu fla flb flc fld fle flf fll flo fls flu foa fob foc foe fof fol foo fos fou fsa fsb fsc fsd fse fsf fsl fso fss fsu fua fub fud fue fuf ful fuo fus fuu la- laa lab lac lad lae laf lal lao las lau lba lbb lbc lbd lbe lbf lbl lbo lbs lbu lca lcb lcc lcd lce lcf lcl lco lcs lcu lda ldb ldc ldd lde ldf ldl ldo lds ldu lea leb lec led lee lef lel leo les leu lfa lfb lfc lfd lfe lff lfl lfo lfs lfu lla llb llc lld lle llf lll llo lls llu loa lob loc lod loe lof lol loo los lou lsa lsb lsc lsd lse lsf lsl lso lss lsu lua lub luc lud lue luf lul luo lus luu oaa oab oac oad oae oaf oal oao oas oau ob- oba obb obc obd obe obf obl obo obs obu oc- oca ocb occ ocd ocf ocl oco ocs ocu oda odb odc odd ode odf odl odo ods odu oea oeb oec oed oee oef oel oeo oes of- ofa ofb ofc ofd ofe off ofl ofo ofs ofu ola olb olc old ole olf oll olo ols olu oo- ooa oob ooc ood oof ool ooo oos os- osa osb osc osd ose osf osl oso oss osu ou- oua ouc oud oue ouf oul ouo ous saa sab sac sad sae saf sal sao sas sau sba sbb sbc sbd sbe sbf sbl sbo sbs sbu sca scb scc scd sce scf scl sco scs scu sda sdb sdc sdd sde sdf sdl sdo sds sdu se- sea seb sec sed see sef sel seo ses seu sfa sfb sfc sfd sfe sff sfl sfo sfs sfu sla slb slc sld sle slf sll slo sls slu soa sob soc sod soe sof sol soo sos sou ss- ssa ssb ssc ssd sse ssf ssl sso sss ssu sua sub suc sud sue suf sul suo sus suu ua- uaa uab uac uad uae uaf ual uao uas uau uba ubb ubc ube ubf ubl ubo ubs ubu uca ucb ucc ucd uce ucf ucl uco ucs ucu uda udb udc udd ude udf udl udo uds udu uea ueb uec ued uee uef uel ues ufa ufc ufd ufe uff ufl ufo ufs ufu ula ulb ulc uld ule ulf ull ulo uls ulu uoa uob uoc uod uoe uol uoo uos usa usb usc usd use