-al a-a a-b a-c aaa aab aac aah aal aau ab- aba abb abc abh abl abu ac- aca acb acc ach acl acu aha ahb ahc ahh ahl ahu al- ala alb alc alh all alu au- aua aub auc auh aul b-u baa bab bac bah bal bau bba bbb bbc bbh bbl bbu bca bcb bcc bch bcl bcu bha bhb bhc bhh bhl bhu bla blb blc blh bll blu bua bub buc buh bul buu c-- caa cab cac cah cal cau cba cbb cbc cbh cbl cbu cca ccb ccc cch ccl ccu ch- cha chb chc chh chl chu cl- cla clb clc clh cll clu cua cub cuc cuh cul cuu haa hab hac hah hal hau hba hbb hbc hbh hbl hbu hca hcb hcc hch hcl hha hhb hhc hhh hhl hhu hla hlb hlc hlh hll hlu hua hub huc huh hul huu la- laa lab lac lah lal lau lba lbb lbc lbh lbl lbu lca lcb lcc lch lcl lcu lha lhb lhc lhh lhu lla llb llc lll llu lua lub luc luh lul luu ua- uaa uab uac uah ual uau uba ubb ubc ubh ubl ubu uca ucb ucc uch ucl ucu uha uhb uhc uhh uhl uhu ula ulb ulc ull ulu uua uuc uuu