-al -ol a-a a-b a-c aaa aab aac aad aaf aal aao aar aau ab- aba abb abc abd abf abl abo abr abu ac- aca acb acc acd acf acl aco acr acu ad- ada adb adc add adf adl ado adr adu af- afa afb afc afd aff afl afo afr afu al- ala alb alc ald alf all alo alr alu aoa aob aoc aod aof aol aoo aor aou ar- ara arb arc ard arf arl aro arr aru au- aua aub auc aud auf aul auo aur b-u baa bab bac bad baf bal bao bar bau bba bbb bbc bbd bbf bbl bbo bbr bbu bca bcb bcc bcd bcf bcl bco bcr bcu bda bdb bdc bdd bdf bdl bdo bdr bdu bfa bfb bfc bfd bff bfl bfo bfr bfu bla blb blc bld blf bll blo blr blu boa bob boc bod bof bol boo bor bou bra brb brd brf brl bro brr bru bua bub buc bud buf bul buo bur buu c-- caa cab cac cad caf cal cao car cau cba cbb cbc cbd cbf cbl cbo cbr cbu cca ccb ccc ccd ccf ccl cco ccr ccu cda cdb cdc cdd cdf cdl cdo cdr cdu cfa cfb cfc cfd cff cfl cfo cfr cfu cl- cla clb clc cld clf cll clo clr clu co- coa cob coc cod cof col coo cor cou cra crb crc crd crf crl cro crr cru cua cub cuc cud cuf cul cuo cur cuu daa dab dac dad daf dal dao dar dau dba dbb dbc dbd dbf dbl dbo dbr dbu dca dcb dcc dcd dcf dcl dco dcr dcu dda ddb ddc ddd ddf ddl ddo ddr ddu dfa dfb dfc dfd dff dfl dfo dfr dfu dl- dla dlb dlc dld dlf dll dlo dlr dlu doa dob doc dod dof dol doo dor dou dra drb drc drd drl dro drr dru dua dub duc dud duf dul duo dur faa fab fac fad faf fal fao far fau fba fbb fbc fbd fbf fbl fbo fbr fbu fca fcb fcc fcd fcf fcl fco fcr fcu fda fdb fdc fdd fdf fdl fdo fdr fdu ffa ffc ffd fff ffl ffo ffr ffu fla flb flc fld flf fll flo flr flu foa fob foc fof fol foo for fou fra frb frc frd frf frl fro frr fru fua fub fud fuf ful fuo fur fuu la- laa lab lac lad laf lal lao lar lau lba lbb lbc lbd lbf lbl lbo lbr lbu lca lcb lcc lcd lcf lcl lco lcr lcu lda ldb ldc ldd ldf ldl ldo ldr ldu lfa lfb lfc lfd lff lfl lfo lfr lfu lla llb llc lld llf lll llo llr llu loa lob loc lod lof lol loo lor lou lra lrb lrc lrd lrf lro lrr lru lua lub luc lud luf lul luo lur luu oaa oab oac oad oaf oal oao oar oau ob- oba obb obc obd obf obl obo obr obu oc- oca ocb occ ocd ocf ocl oco ocr ocu oda odb odc odd odf odl odo odr odu of- ofa ofb ofc ofd off ofl ofo ofr ofu ola olb olc old olf oll olo olu oo- ooa oob ooc ood oof ool ooo oor or- ora orb orc ord orf orl oro orr oru ou- oua ouc oud ouf oul ouo our ra- raa rab rac rad raf ral rao rar rau rba rbb rbc rbd rbf rbl rbo rbr rbu rca rcb rcc rcd rcf rcl rco rcr rcu rda rdb rdc rdd rdf rdl rdo rdr rdu rfa rfb rfc rfd rff rfl rfo rfr rfu rla rlc rld rlf rll rlo rlr rlu roa rob roc rod rof rol roo ror rou rra rrb rrc rrd rrf rrl rrr rru rua rub ruc rud ruf ruo rur ruu ua- uaa uab uac uad uaf ual uao uar uau uba ubb ubc ubf ubl ubo ubr ubu uca ucb ucc ucd ucf ucl uco ucr ucu uda udb udc udd udf udl udo udr udu ufa ufc ufd uff ufl ufo ufr ufu ula ulb ulc uld ulf ull ulo ulr ulu uoa uob uoc uod uol uoo uor ur- ura urb urc urd urf url uro urr uru uua uuc uur uuu

a-do a-fu aaaa aaab aaac aaad aaaf aaal aaar aaba aabb aabc aabd aabl aaca aacb aacc aacd aacf aacl aaco aacr aacu aada aadc aadu aafa aafb aafc aafd aaff aafl aala aalc aald aall aalo aalu aaoo aara aarc aard aaro aaru abaa abab abac abad abaf abal abar abau abb- abba abbb abbo abbr abca abcb abcc abcd abcf abcl abcr abda abdo abdu abff abla ablo aboa abob abod abof abol aboo abor abou abra abrc abro abua abud abuf abul acaa acab acac acad acar acba acbl acca accc accd accf acco accu acda acdb acdc acdf acfc acfd acfl acla aclc aclr aclu acoa acod acol acor acou acr- acra acrc acro acrr acu- acuf acul acuo acur adaa adab adac adad adal adao adar adba adbc adcc adda addc addd addl addo addr addu adfa adfc adfl adob adoc adod adoo ador adra adro adua adub adur afaa afad afao afar afca afcb afcc afcu afdb afdc afdl affa affc affo afla aflc afoa afol afoo afor afr- afra afrc afro afru afua afud alaa alac alad alal alao alar alau alb- alba albc albo albu alca alcc alco ald- alda aldl aldo alfa all- alla alll allo allr allu aloa aloc alod alof alol aloo alor alou alro alua aluf alur aoba aoca aola aora aorb aouf aoul arab arac arad araf aral arar arau arba arc- arca arco arda ardc ardf ardl ardo ardu arfa arfb arfc arff arfu arla arlo aroa arob arod aroo aror arr- arra arrc arro arrr arru arua arub arud arul auaa auca audc