-al -er -ol a-a a-b a-c aaa aab aac aae aal aao aar aau ab- aba abb abc abe abl abo abr abu ac- aca acb acc ace acl aco acr acu aea aeb aec aee ael aeo aer aeu al- ala alb alc ale all alo alr alu aoa aob aoc aoe aol aoo aor aou ar- ara arb arc are arl aro arr aru au- aua aub auc aue aul auo aur b-u baa bab bac bae bal bao bar bau bba bbb bbc bbe bbl bbo bbr bbu bca bcb bcc bce bcl bco bcr bcu be- bea beb bec bee bel beo ber beu bla blb blc ble bll blo blr blu boa bob boc boe bol boo bor bou bra brb bre brl bro brr bru bua bub buc bue bul buo bur buu c-- caa cab cac cae cal cao car cau cba cbb cbc cbe cbl cbo cbr cbu cca ccb ccc cce ccl cco ccr ccu ce- cea ceb cec cee cel ceo cer ceu cl- cla clb clc cle cll clo clr clu co- coa cob coc coe col coo cor cou cra crb crc cre crl cro crr cru cua cub cuc cue cul cuo cur cuu eaa eab eac eae eal eao ear eau eba ebb ebc ebe ebl ebo ebr ebu ec- eca ecb ecc ece ecl eco ecr ecu eea eeb eec eee eel eeo eer ela elb elc ele ell elo elr elu eo- eoa eob eoc eoe eol eoo eor eou era erb erc ere erl ero err eru eu- eua eub euc eue eul eur la- laa lab lac lae lal lao lar lau lba lbb lbc lbe lbl lbo lbr lbu lca lcb lcc lce lcl lco lcr lcu lea leb lec lee lel leo ler leu lla llb llc lle lll llo llr llu loa lob loc loe lol loo lor lou lra lrb lrc lro lrr lru lua lub luc lue lul luo lur luu oaa oab oac oae oal oao oar oau ob- oba obb obc obe obl obo obr obu oc- oca ocb occ ocl oco ocr ocu oea oeb oec oee oel oeo oer ola olb olc ole oll olo olu oo- ooa oob ooc ool ooo oor or- ora orb orc ore orl oro orr oru ou- oua ouc oue oul ouo our ra- raa rab rac rae ral rao rar rau rba rbb rbc rbe rbl rbo rbr rbu rca rcb rcc rce rcl rco rcr rcu re- rea reb rec ree rel reo rer reu rla rlc rle rll rlo rlr rlu roa rob roc roe rol roo ror rou rra rrb rrc rrl rrr rru rua rub ruc rue ruo rur ruu ua- uaa uab uac uae ual uao uar uau uba ubb ubc ube ubl ubo ubr ubu uca ucb ucc uce ucl uco ucr ucu uea ueb uec uee uel uer ula ulb ulc ule ull ulo ulr ulu uoa uob uoc uoe uol uoo uor ur- ura urb urc ure url uro urr uru uua uuc uue uur uuu