a-a a-b a-q aaa aab aae aak aan aaq aas ab- aba abb abe abk abn abq abs aea aeb aee aek aen aeq aes aka akb ake akk akn aks an- ana anb ane ank ann anq ans aqa aqn aqs as- asa asb ase ask asn asq ass baa bab bae bak ban baq bas bba bbb bbe bbk bbn bbq bbs be- bea beb bee bek ben beq bes bka bkb bke bkk bkn bkq bks bna bnb bne bnk bnn bns bqe bsa bsb bse bsk bsn bss eaa eab eae eak ean eas eba ebb ebe ebk ebn ebq ebs eea eeb eee eek een ees eka ekb eke eks en- ena enb ene enk enn ens eqa eqe eqn eqq eqs es- esa esb ese esk esn esq ess ka- kaa kab kae kak kan kas kba kbb kbe kbk kbn kbs ke- kea keb kee kek ken kes kkb kke kkk kkn kks kn- kna kne knk knn kqa ksa ksb kse ksk ksn kss naa nab nae nak nan nas nba nbb nbe nbk nbn nbs ne- nea neb nee nek nen nes nka nke nkk nkn nks nna nnb nne nnk nnn nns nqs nsa nsb nse nsk nsn nss qaa qan qas qba qbe qbq qbs qee qen qnb qne qnk qns qqk qqq qsa saa sab sae sak san saq sas sba sbb sbe sbk sbn sbq sbs se- sea seb see sek sen seq ses sk- ska skb ske skk skq sks sna snb sne snk snn sns sqa sqn sqq sqs ss- ssa ssb sse ssk ssn ssq sss