a-a a-b a-t aaa aab aad aan aas aat aav ab- aba abb abd abn abs abt abv ad- ada adb add adn ads adt adv an- ana anb and ann ans ant anv as- asa asb asd asn ass ast asv at- ata atb atd atn ats att atv av- ava avb avd avn avs avt baa bab bad ban bas bat bav bba bbb bbd bbn bbs bbt bda bdb bdd bds bdt bdv bna bnb bnd bnn bns bnt bnv bsa bsb bsd bsn bss bst bsv bta btb btd btn bts btt btv bva bvb bvd bvn bvs bvt bvv daa dab dad dan das dat dav dba dbb dbd dbn dbs dbt dbv dda ddb ddd ddn dds ddt dna dnb dnd dnn dns dnt dsa dsb dsd dsn dss dst dsv dta dtb dtd dtn dts dtt dtv dva dvb dvd dvn dvs dvt naa nab nad nan nas nat nav nba nbb nbd nbn nbs nbt nbv nda ndb ndd ndn nds ndt ndv nna nnb nnn nns nnt nnv nsa nsb nsd nsn nss nst nsv nta ntb ntd ntn nts ntt ntv nva nvb nvd nvn nvt nvv saa sab sad san sas sat sav sba sbb sbd sbn sbs sbt sbv sda sdb sdd sdn sds sdt sdv sna snb snd snn sns snt snv ss- ssa ssb ssd ssn sss sst ssv sta stb std stn sts stt stv sva svb svd svn svs svt svv taa tab tad tan tas tat tav tba tbb tbd tbn tbs tbt tbv tda tdb tdd tdn tds tdt tdv tna tnb tnd tnn tns tnt tsa tsb tsd tsn tss tst tsv tta ttb ttd ttn tts ttt ttv tva tvb tvd tvn tvs tvt v-a vaa vab vad van vas vat vav vba vbd vbs vbv vdb vdd vds vdt vdv vn- vna vnd vns vnv vsa vsb vsd vsn vss vst vsv vta vtb vts vtt vtv vva vvb vvs vvt vvv