a-a a-b a-c aaa aab aac aah aak aan aas aau ab- aba abb abc abh abk abn abs abu ac- aca acb acc ach ack acn acs acu aha ahb ahc ahh ahk ahn ahs ahu aka akb akc akh akk akn aks aku an- ana anb anc anh ank ann ans anu as- asa asb asc ash ask asn ass asu au- aua aub auc auh auk aun aus b-u baa bab bac bah bak ban bas bau bba bbb bbc bbh bbk bbn bbs bbu bca bcb bcc bch bck bcn bcs bcu bha bhb bhc bhh bhk bhs bhu bka bkb bkc bkk bkn bks bna bnb bnc bnk bnn bns bnu bsa bsb bsc bsh bsk bsn bss bsu bua bub buc buh buk bun bus buu c-- caa cab cac cah cak can cas cau cba cbb cbc cbh cbk cbn cbs cbu cca ccb ccc cch cck ccn ccs ccu ch- cha chb chc chh chk chn chs chu cka ckb ckc ckh cks cn- cna cnb cnc cnh cnn cns cnu csa csb csc csh csk csn css csu cua cub cuc cuh cuk cun cus cuu haa hab hac hah hak han has hau hba hbb hbc hbh hbk hbn hbs hbu hca hcb hcc hch hck hcn hcs hha hhb hhc hhh hhk hhn hhs hhu hka hkb hkh hkk hkn hks hku hna hnb hnc hnh hnk hnn hns hnu hsa hsb hsc hsh hsk hsn hss hsu hua hub huc huh huk hun hus huu ka- kaa kab kac kah kak kan kas kau kba kbb kbc kbh kbk kbn kbs kbu kca kcb kcc kch kck kcn kcs kcu kha khh khk khn khs khu kkb kkc kkh kkk kkn kks kku kn- kna knc knk knn knu ksa ksb ksc ksh ksk ksn kss ksu kub kuc kuh kuk kun kus kuu naa nab nac nah nak nan nas nau nba nbb nbc nbk nbn nbs nbu nca ncb ncc nch nck ncn ncs ncu nha nhb nhc nhh nhk nhn nhs nhu nka nkc nkk nkn nks nku nna nnb nnc nnh nnk nnn nns nnu nsa nsb nsc nsh nsk nsn nss nsu nua nub nuc nuh nuk nun nus nuu saa sab sac sah sak san sas sau sba sbb sbc sbh sbk sbn sbs sbu sca scb scc sch sck scn scs scu sh- sha shb shc shh shk shn shs shu sk- ska skb skc skh skk sks sku sna snb snc snk snn sns snu ss- ssa ssb ssc ssh ssk ssn sss ssu sua sub suc suh suk sun sus suu ua- uaa uab uac uah uak uan uas uau uba ubb ubc ubh ubk ubn ubs ubu uca ucb ucc uch uck ucn ucs ucu uha uhb uhc uhh uhs uhu uka ukb ukc ukk ukn uku un- una unb unc unh unk unn uns unu usa usb usc ush usk usn uss usu uua uuc uun uus uuu