-al -ol a-a a-b a-c aaa aab aac aal aan aao aas aau ab- aba abb abc abl abn abo abs abu ac- aca acb acc acl acn aco acs acu al- ala alb alc all aln alo als alu an- ana anb anc anl ann ano ans anu aoa aob aoc aol aon aoo aos aou as- asa asb asc asl asn aso ass asu au- aua aub auc aul aun auo aus b-u baa bab bac bal ban bao bas bau bba bbb bbc bbl bbn bbo bbs bbu bca bcb bcc bcl bcn bco bcs bcu bla blb blc bll bln blo bls blu bna bnb bnc bnl bnn bno bns bnu boa bob boc bol bon boo bos bou bsa bsb bsc bsl bsn bso bss bsu bua bub buc bul bun buo bus buu c-- caa cab cac cal can cao cas cau cba cbb cbc cbl cbn cbo cbs cbu cca ccb ccc ccl ccn cco ccs ccu cl- cla clb clc cll cln clo cls clu cn- cna cnb cnc cnl cnn cno cns cnu co- coa cob coc col con coo cos cou csa csb csc csl csn cso css csu cua cub cuc cul cun cuo cus cuu la- laa lab lac lal lan lao las lau lba lbb lbc lbl lbo lbs lbu lca lcb lcc lcl lcn lco lcs lcu lla llb llc lll lln llo lls llu lna lnb lnc lnl lnn lno lns lnu loa lob loc lol lon loo los lou lsa lsb lsc lsl lsn lso lss lsu lua lub luc lul lun luo lus luu naa nab nac nal nan nao nas nau nba nbb nbc nbl nbn nbo nbs nbu nca ncb ncc ncl ncn nco ncs ncu nla nlb nlc nll nln nlo nls nlu nna nnb nnc nnl nnn nno nns nnu no- noa nob noc nol non noo nos nou nsa nsb nsc nsl nsn nso nss nsu nua nub nuc nul nun nuo nus nuu oaa oab oac oal oan oao oas oau ob- oba obb obc obl obn obo obs obu oc- oca ocb occ ocl ocn oco ocs ocu ola olb olc oll oln olo ols olu on- ona onb onc onl onn ono ons onu oo- ooa oob ooc ool oon ooo oos os- osa osb osc osl osn oso oss osu ou- oua ouc oul oun ouo ous saa sab sac sal san sao sas sau sba sbb sbc sbl sbn sbo sbs sbu sca scb scc scl scn sco scs scu sla slb slc sll sln slo sls slu sna snb snc snl snn sno sns snu soa sob soc sol son soo sos sou ss- ssa ssb ssc ssl ssn sso sss ssu sua sub suc sul sun suo sus suu ua- uaa uab uac ual uan uao uas uau uba ubb ubc ubl ubn ubo ubs ubu uca ucb ucc ucl ucn uco ucs ucu ula ulb ulc ull uln ulo uls ulu un- una unb unc unl unn uno uns unu uoa uob uoc uol uon uoo uos usa usb usc usl usn uso uss usu uua uuc uun uus uuu