-al a-a a-b a-c aaa aab aac aaf aah aal aau ab- aba abb abc abf abh abl abu ac- aca acb acc acf ach acl acu af- afa afb afc aff afh afl afu aha ahb ahc ahf ahh ahl ahu al- ala alb alc alf alh all alu au- aua aub auc auf auh aul b-u baa bab bac baf bah bal bau bba bbb bbc bbf bbh bbl bbu bca bcb bcc bcf bch bcl bcu bfa bfb bfc bff bfh bfl bfu bha bhb bhc bhf bhh bhl bhu bla blb blc blf blh bll blu bua bub buc buf buh bul buu c-- caa cab cac caf cah cal cau cba cbb cbc cbf cbh cbl cbu cca ccb ccc ccf cch ccl ccu cfa cfb cfc cff cfh cfl cfu ch- cha chb chc chf chh chl chu cl- cla clb clc clf clh cll clu cua cub cuc cuf cuh cul cuu faa fab fac faf fah fal fau fba fbb fbc fbf fbh fbl fbu fca fcb fcc fcf fcl fcu ffa ffc fff ffh ffl ffu fha fhb fhc fhf fhh fhl fla flb flc flf fll flu fua fub fuf ful fuu haa hab hac haf hah hal hau hba hbb hbc hbf hbh hbl hbu hca hcb hcc hcf hch hcl hfa hfb hfc hff hfh hfl hfu hha hhb hhc hhf hhh hhl hhu hla hlb hlc hlf hlh hll hlu hua hub huc huf huh hul huu la- laa lab lac laf lah lal lau lba lbb lbc lbf lbh lbl lbu lca lcb lcc lcf lch lcl lcu lfa lfb lfc lff lfh lfl lfu lha lhb lhc lhf lhh lhu lla llb llc llf lll llu lua lub luc luf luh lul luu ua- uaa uab uac uaf uah ual uau uba ubb ubc ubf ubh ubl ubu uca ucb ucc ucf uch ucl ucu ufa ufc uff ufh ufl ufu uha uhb uhc uhf uhh uhl uhu ula ulb ulc ulf ull ulu uua uuc uuu