a-a a-b a-t aaa aab aad aar aas aat aav ab- aba abb abd abr abs abt abv ad- ada adb add adr ads adt adv ar- ara arb ard arr ars art arv as- asa asb asd asr ass ast asv at- ata atb atd atr ats att atv av- ava avb avd avr avs avt baa bab bad bar bas bat bav bba bbb bbd bbr bbs bbt bda bdb bdd bdr bds bdt bdv bra brb brd brr brs brt brv bsa bsb bsd bsr bss bst bsv bta btb btd btr bts btt btv bva bvb bvd bvr bvs bvt bvv daa dab dad dar das dat dav dba dbb dbd dbr dbs dbt dbv dda ddb ddd ddr dds ddt dra drb drd drr drs drt drv dsa dsb dsd dsr dss dst dsv dta dtb dtd dtr dts dtt dtv dva dvb dvd dvr dvs dvt ra- raa rab rad rar ras rat rav rba rbb rbd rbr rbs rbt rda rdb rdd rdr rds rdt rdv rra rrb rrd rrr rrs rrt rsa rsb rsd rsr rss rst rsv rta rtb rtd rtr rts rtt rtv rva rvb rvd rvr rvs rvt rvv saa sab sad sar sas sat sav sba sbb sbd sbr sbs sbt sbv sda sdb sdd sdr sds sdt sdv sr- sra srb srd srr srs srt srv ss- ssa ssb ssd ssr sss sst ssv sta stb std str sts stt stv sva svb svd svr svs svt svv taa tab tad tar tas tat tav tba tbb tbd tbr tbs tbt tbv tda tdb tdd tdr tds tdt tdv tra trb trd trr trs trt trv tsa tsb tsd tsr tss tst tsv tta ttb ttd ttr tts ttt ttv tva tvb tvd tvr tvs tvt v-a vaa vab vad var vas vat vav vba vbd vbr vbs vbv vdb vdd vdr vds vdt vdv vra vrb vrd vrr vrs vrt vsa vsb vsd vsr vss vst vsv vta vtb vtr vts vtt vtv vva vvb vvr vvs vvt vvv