a-a a-b a-t aaa aab aan aao aas aat aav ab- aba abb abn abo abs abt abv an- ana anb ann ano ans ant anv aoa aob aon aoo aos aot aov as- asa asb asn aso ass ast asv at- ata atb atn ato ats att atv av- ava avb avn avo avs avt baa bab ban bao bas bat bav bba bbb bbn bbo bbs bbt bna bnb bnn bno bns bnt bnv boa bob bon boo bos bot bov bsa bsb bsn bso bss bst bsv bta btb btn bto bts btt btv bva bvb bvn bvo bvs bvt bvv naa nab nan nao nas nat nav nba nbb nbn nbo nbs nbt nbv nna nnb nnn nno nns nnt nnv no- noa nob non noo nos not nov nsa nsb nsn nso nss nst nsv nta ntb ntn nto nts ntt ntv nva nvb nvn nvt nvv oaa oab oan oao oas oat oav ob- oba obb obn obo obs obt obv on- ona onb onn ono ons ont oo- ooa oob oon ooo oos oot oov os- osa osb osn oso oss ost osv ot- ota otb otn oto ots ott otv ov- ova ovb ovo ovs ovv saa sab san sao sas sat sav sba sbb sbn sbo sbs sbt sbv sna snb snn sno sns snt snv soa sob son soo sos sot sov ss- ssa ssb ssn sso sss sst ssv sta stb stn sto sts stt stv sva svb svn svo svs svt svv taa tab tan tao tas tat tav tba tbb tbn tbo tbs tbt tbv tna tnb tnn tno tns tnt to- toa tob ton too tos tot tov tsa tsb tsn tso tss tst tsv tta ttb ttn tto tts ttt ttv tva tvb tvn tvo tvs tvt v-a vaa vab van vao vas vat vav vba vbo vbs vbv vn- vna vno vns vnv voa vob von voo vos vot vov vsa vsb vsn vso vss vst vsv vta vtb vto vts vtt vtv vva vvb vvo vvs vvt vvv