-al -ol a-a a-b aaa aab aal aan aao aas ab- aba abb abl abn abo abs al- ala alb all aln alo als an- ana anb anl ann ano ans aoa aob aol aon aoo aos as- asa asb asl asn aso ass baa bab bal ban bao bas bba bbb bbl bbn bbo bbs bla blb bll bln blo bls bna bnb bnl bnn bno bns boa bob bol bon boo bos bsa bsb bsl bsn bso bss la- laa lab lal lan lao las lba lbb lbl lbo lbs lla llb lll lln llo lls lna lnb lnl lnn lno lns loa lob lol lon loo los lsa lsb lsl lsn lso lss naa nab nal nan nao nas nba nbb nbl nbn nbo nbs nla nlb nll nln nlo nls nna nnb nnl nnn nno nns no- noa nob nol non noo nos nsa nsb nsl nsn nso nss oaa oab oal oan oao oas ob- oba obb obl obn obo obs ola olb oll oln olo ols on- ona onb onl onn ono ons oo- ooa oob ool oon ooo oos os- osa osb osl osn oso oss saa sab sal san sao sas sba sbb sbl sbn sbo sbs sla slb sll sln slo sls sna snb snl snn sno sns soa sob sol son soo sos ss- ssa ssb ssl ssn sso sss