-al -ol a-a a-b a-c aaa aab aac aad aal aao aas aau ab- aba abb abc abd abl abo abs abu ac- aca acb acc acd acl aco acs acu ad- ada adb adc add adl ado ads adu al- ala alb alc ald all alo als alu aoa aob aoc aod aol aoo aos aou as- asa asb asc asd asl aso ass asu au- aua aub auc aud aul auo aus b-u baa bab bac bad bal bao bas bau bba bbb bbc bbd bbl bbo bbs bbu bca bcb bcc bcd bcl bco bcs bcu bda bdb bdc bdd bdl bdo bds bdu bla blb blc bld bll blo bls blu boa bob boc bod bol boo bos bou bsa bsb bsc bsd bsl bso bss bsu bua bub buc bud bul buo bus buu c-- caa cab cac cad cal cao cas cau cba cbb cbc cbd cbl cbo cbs cbu cca ccb ccc ccd ccl cco ccs ccu cda cdb cdc cdd cdl cdo cds cdu cl- cla clb clc cld cll clo cls clu co- coa cob coc cod col coo cos cou csa csb csc csd csl cso css csu cua cub cuc cud cul cuo cus cuu daa dab dac dad dal dao das dau dba dbb dbc dbd dbl dbo dbs dbu dca dcb dcc dcd dcl dco dcs dcu dda ddb ddc ddd ddl ddo dds ddu dl- dla dlb dlc dld dll dlo dls dlu doa dob doc dod dol doo dos dou dsa dsb dsc dsd dsl dso dss dsu dua dub duc dud dul duo dus la- laa lab lac lad lal lao las lau lba lbb lbc lbd lbl lbo lbs lbu lca lcb lcc lcd lcl lco lcs lcu lda ldb ldc ldd ldl ldo lds ldu lla llb llc lld lll llo lls llu loa lob loc lod lol loo los lou lsa lsb lsc lsd lsl lso lss lsu lua lub luc lud lul luo lus luu oaa oab oac oad oal oao oas oau ob- oba obb obc obd obl obo obs obu oc- oca ocb occ ocd ocl oco ocs ocu oda odb odc odd odl odo ods odu ola olb olc old oll olo ols olu oo- ooa oob ooc ood ool ooo oos os- osa osb osc osd osl oso oss osu ou- oua ouc oud oul ouo ous saa sab sac sad sal sao sas sau sba sbb sbc sbd sbl sbo sbs sbu sca scb scc scd scl sco scs scu sda sdb sdc sdd sdl sdo sds sdu sla slb slc sld sll slo sls slu soa sob soc sod sol soo sos sou ss- ssa ssb ssc ssd ssl sso sss ssu sua sub suc sud sul suo sus suu ua- uaa uab uac uad ual uao uas uau uba ubb ubc ubl ubo ubs ubu uca ucb ucc ucd ucl uco ucs ucu uda udb udc udd udl udo uds udu ula ulb ulc uld ull ulo uls ulu uoa uob uoc uod uol uoo uos usa usb usc usd usl uso uss usu uua uuc uus uuu