-al a-a a-b a-c aaa aab aac aae aak aal aas aau ab- aba abb abc abe abk abl abs abu ac- aca acb acc ace ack acl acs acu aea aeb aec aee aek ael aes aeu aka akb akc ake akk akl aks aku al- ala alb alc ale alk all als alu as- asa asb asc ase ask asl ass asu au- aua aub auc aue auk aul aus b-u baa bab bac bae bak bal bas bau bba bbb bbc bbe bbk bbl bbs bbu bca bcb bcc bce bck bcl bcs bcu be- bea beb bec bee bek bel bes beu bka bkb bkc bke bkk bkl bks bla blb blc ble blk bll bls blu bsa bsb bsc bse bsk bsl bss bsu bua bub buc bue buk bul bus buu c-- caa cab cac cae cak cal cas cau cba cbb cbc cbe cbk cbl cbs cbu cca ccb ccc cce cck ccl ccs ccu ce- cea ceb cec cee cek cel ces ceu cka ckb ckc cks cl- cla clb clc cle clk cll cls clu csa csb csc cse csk csl css csu cua cub cuc cue cuk cul cus cuu eaa eab eac eae eak eal eas eau eba ebb ebc ebe ebk ebl ebs ebu ec- eca ecb ecc ece eck ecl ecs ecu eea eeb eec eee eek eel ees eka ekb ekc eke ekl eks eku ela elb elc ele elk ell els elu es- esa esb esc ese esk esl ess esu eu- eua eub euc eue eul eus ka- kaa kab kac kae kak kal kas kau kba kbb kbc kbe kbk kbl kbs kbu kca kcb kcc kce kck kcl kcs kcu ke- kea keb kec kee kek kel kes kkb kkc kke kkk kkl kks kku kl- kla klb klc kls klu ksa ksb ksc kse ksk ksl kss ksu kub kuc kue kuk kul kus kuu la- laa lab lac lae lak lal las lau lba lbb lbc lbe lbk lbl lbs lbu lca lcb lcc lce lck lcl lcs lcu lea leb lec lee lek lel les leu lka lkb lkl lks lla llb llc lle llk lll lls llu lsa lsb lsc lse lsk lsl lss lsu lua lub luc lue luk lul lus luu saa sab sac sae sak sal sas sau sba sbb sbc sbe sbk sbl sbs sbu sca scb scc sce sck scl scs scu se- sea seb sec see sek sel ses seu sk- ska skb skc ske skk skl sks sku sla slb slc sle slk sll sls slu ss- ssa ssb ssc sse ssk ssl sss ssu sua sub suc sue suk sul sus suu ua- uaa uab uac uae uak ual uas uau uba ubb ubc ube ubk ubl ubs ubu uca ucb ucc uce uck ucl ucs ucu uea ueb uec uee uel ues uka ukb ukc uke ukk ukl uku ula ulb ulc ule ulk ull uls ulu usa usb usc use usk usl uss usu uua uuc uue uus uuu