-al -er -ol a-a a-b a-c aaa aab aac aad aae aal aao aar aau ab- aba abb abc abd abe abl abo abr abu ac- aca acb acc acd ace acl aco acr acu ad- ada adb adc add ade adl ado adr adu aea aeb aec aed aee ael aeo aer aeu al- ala alb alc ald ale all alo alr alu aoa aob aoc aod aoe aol aoo aor aou ar- ara arb arc ard are arl aro arr aru au- aua aub auc aud aue aul auo aur b-u baa bab bac bad bae bal bao bar bau bba bbb bbc bbd bbe bbl bbo bbr bbu bca bcb bcc bcd bce bcl bco bcr bcu bda bdb bdc bdd bde bdl bdo bdr bdu be- bea beb bec bed bee bel beo ber beu bla blb blc bld ble bll blo blr blu boa bob boc bod boe bol boo bor bou bra brb brd bre brl bro brr bru bua bub buc bud bue bul buo bur buu c-- caa cab cac cad cae cal cao car cau cba cbb cbc cbd cbe cbl cbo cbr cbu cca ccb ccc ccd cce ccl cco ccr ccu cda cdb cdc cdd cde cdl cdo cdr cdu ce- cea ceb cec ced cee cel ceo cer ceu cl- cla clb clc cld cle cll clo clr clu co- coa cob coc cod coe col coo cor cou cra crb crc crd cre crl cro crr cru cua cub cuc cud cue cul cuo cur cuu daa dab dac dad dae dal dao dar dau dba dbb dbc dbd dbe dbl dbo dbr dbu dca dcb dcc dcd dce dcl dco dcr dcu dda ddb ddc ddd dde ddl ddo ddr ddu de- dea deb dec ded dee del deo der deu dl- dla dlb dlc dld dle dll dlo dlr dlu doa dob doc dod doe dol doo dor dou dra drb drc drd dre drl dro drr dru dua dub duc dud due dul duo dur eaa eab eac ead eae eal eao ear eau eba ebb ebc ebd ebe ebl ebo ebr ebu ec- eca ecb ecc ecd ece ecl eco ecr ecu ed- eda edb edc edd ede edl edo edr edu eea eeb eec eed eee eel eeo eer ela elb elc eld ele ell elo elr elu eo- eoa eob eoc eod eoe eol eoo eor eou era erb erc erd ere erl ero err eru eu- eua eub euc eud eue eul eur la- laa lab lac lad lae lal lao lar lau lba lbb lbc lbd lbe lbl lbo lbr lbu lca lcb lcc lcd lce lcl lco lcr lcu lda ldb ldc ldd lde ldl ldo ldr ldu lea leb lec led lee lel leo ler leu lla llb llc lld lle lll llo llr llu loa lob loc lod loe lol loo lor lou lra lrb lrc lrd lro lrr lru lua lub luc lud lue lul luo lur luu oaa oab oac oad oae oal oao oar oau ob- oba obb obc obd obe obl obo obr obu oc- oca ocb occ ocd ocl oco ocr ocu oda odb odc odd ode odl odo odr odu oea oeb oec oed oee oel oeo oer ola olb olc old ole oll olo olu oo- ooa oob ooc ood ool ooo oor or- ora orb orc ord ore orl oro orr oru ou- oua ouc oud oue oul ouo our ra- raa rab rac rad rae ral rao rar rau rba rbb rbc rbd rbe rbl rbo rbr rbu rca rcb rcc rcd rce rcl rco rcr rcu rda rdb rdc rdd rde rdl rdo rdr rdu re- rea reb rec red ree rel reo rer reu rla rlc rld rle rll rlo rlr rlu roa rob roc rod roe rol roo ror rou rra rrb rrc rrd rrl rrr rru rua rub ruc rud rue ruo rur ruu ua- uaa uab uac uad uae ual uao uar uau uba ubb ubc ube ubl ubo ubr ubu uca ucb ucc ucd uce ucl uco ucr ucu uda udb udc udd ude udl udo udr udu uea ueb uec ued uee uel uer ula ulb ulc uld ule ull ulo ulr ulu uoa uob uoc uod uoe uol uoo uor ur- ura urb urc urd ure url uro urr uru uua uuc uue uur uuu