-al a-a a-b a-c aaa aab aac aad aal aas aau ab- aba abb abc abd abl abs abu ac- aca acb acc acd acl acs acu ad- ada adb adc add adl ads adu al- ala alb alc ald all als alu as- asa asb asc asd asl ass asu au- aua aub auc aud aul aus b-u baa bab bac bad bal bas bau bba bbb bbc bbd bbl bbs bbu bca bcb bcc bcd bcl bcs bcu bda bdb bdc bdd bdl bds bdu bla blb blc bld bll bls blu bsa bsb bsc bsd bsl bss bsu bua bub buc bud bul bus buu c-- caa cab cac cad cal cas cau cba cbb cbc cbd cbl cbs cbu cca ccb ccc ccd ccl ccs ccu cda cdb cdc cdd cdl cds cdu cl- cla clb clc cld cll cls clu csa csb csc csd csl css csu cua cub cuc cud cul cus cuu daa dab dac dad dal das dau dba dbb dbc dbd dbl dbs dbu dca dcb dcc dcd dcl dcs dcu dda ddb ddc ddd ddl dds ddu dl- dla dlb dlc dld dll dls dlu dsa dsb dsc dsd dsl dss dsu dua dub duc dud dul dus la- laa lab lac lad lal las lau lba lbb lbc lbd lbl lbs lbu lca lcb lcc lcd lcl lcs lcu lda ldb ldc ldd ldl lds ldu lla llb llc lld lll lls llu lsa lsb lsc lsd lsl lss lsu lua lub luc lud lul lus luu saa sab sac sad sal sas sau sba sbb sbc sbd sbl sbs sbu sca scb scc scd scl scs scu sda sdb sdc sdd sdl sds sdu sla slb slc sld sll sls slu ss- ssa ssb ssc ssd ssl sss ssu sua sub suc sud sul sus suu ua- uaa uab uac uad ual uas uau uba ubb ubc ubl ubs ubu uca ucb ucc ucd ucl ucs ucu uda udb udc udd udl uds udu ula ulb ulc uld ull uls ulu usa usb usc usd usl uss usu uua uuc uus uuu