a-a a-b a-c aaa aab aac aae aah aak aan aao aau ab- aba abb abc abe abh abk abn abo abu ac- aca acb acc ace ach ack acn aco acu aea aeb aec aee aeh aek aen aeo aeu aha ahb ahc ahe ahh ahk ahn aho ahu aka akb akc ake akh akk akn ako aku an- ana anb anc ane anh ank ann ano anu aoa aob aoc aoe aoh aok aon aoo aou au- aua aub auc aue auh auk aun auo b-u baa bab bac bae bah bak ban bao bau bba bbb bbc bbe bbh bbk bbn bbo bbu bca bcb bcc bce bch bck bcn bco bcu be- bea beb bec bee beh bek ben beo beu bha bhb bhc bhe bhh bhk bho bhu bka bkb bkc bke bkk bkn bko bna bnb bnc bne bnk bnn bno bnu boa bob boc boe boh bok bon boo bou bua bub buc bue buh buk bun buo buu c-- caa cab cac cae cah cak can cao cau cba cbb cbc cbe cbh cbk cbn cbo cbu cca ccb ccc cce cch cck ccn cco ccu ce- cea ceb cec cee ceh cek cen ceo ceu ch- cha chb chc che chh chk chn cho chu cka ckb ckc ckh cko cn- cna cnb cnc cne cnh cnn cno cnu co- coa cob coc coe coh cok con coo cou cua cub cuc cue cuh cuk cun cuo cuu eaa eab eac eae eah eak ean eao eau eba ebb ebc ebe ebh ebk ebn ebo ebu ec- eca ecb ecc ece ech eck ecn eco ecu eea eeb eec eee eek een eeo eha ehb ehc ehe ehh ehn eho ehu eka ekb ekc eke ekh eko eku en- ena enb enc ene enh enk enn eno enu eo- eoa eob eoc eoe eoh eok eon eoo eou eu- eua eub euc eue eun haa hab hac hae hah hak han hao hau hba hbb hbc hbe hbh hbk hbn hbo hbu hca hcb hcc hce hch hck hcn hco he- hea heb hec hee heh hek hen heo heu hha hhb hhc hhe hhh hhk hhn hho hhu hka hkb hkh hkk hkn hko hku hna hnb hnc hne hnh hnk hnn hno hnu hoa hob hoc hoe hoh hok hon hoo hou hua hub huc hue huh huk hun huo huu ka- kaa kab kac kae kah kak kan kao kau kba kbb kbc kbe kbh kbk kbn kbo kbu kca kcb kcc kce kch kck kcn kcu ke- kea keb kec kee keh kek ken keo kha khe khh khk khn kho khu kkb kkc kke kkh kkk kkn kku kn- kna knc kne knk knn kno knu koa kob koc koe koh kok kon koo kou kub kuc kue kuh kuk kun kuu naa nab nac nae nah nak nan nao nau nba nbb nbc nbe nbk nbn nbo nbu nca ncb ncc nce nch nck ncn nco ncu ne- nea neb nec nee neh nek nen neo neu nha nhb nhc nhe nhh nhk nhn nhu nka nkc nke nkk nkn nko nku nna nnb nnc nne nnh nnk nnn nno nnu no- noa nob noc noe noh nok non noo nou nua nub nuc nue nuh nuk nun nuo nuu oaa oab oac oae oah oak oan oao oau ob- oba obb obc obe obh obk obn obo obu oc- oca ocb occ och ock ocn oco ocu oea oeb oec oee oeh oen oeo oha ohc ohe ohh ohn oho ohu oka okb okc oke okk oko oku on- ona onb onc one onh onk onn ono onu oo- ooa oob ooc ooh ook oon ooo ou- oua ouc oue ouh ouk oun ouo ua- uaa uab uac uae uah uak uan uao uau uba ubb ubc ube ubh ubk ubn ubo ubu uca ucb ucc uce uch uck ucn uco ucu uea ueb uec uee ueh uen uha uhb uhc uhe uhh uho uhu uka ukb ukc uke ukk ukn uku un- una unb unc une unh unk unn uno unu uoa uob uoc uoe uok uon uoo uua uuc uue uun uuu