a-a a-b a-t aaa aab aad aao aar aat aaw ab- aba abb abd abo abr abt abw ad- ada adb add ado adr adt adw aoa aob aod aoo aor aot aow ar- ara arb ard aro arr art arw at- ata atb atd ato atr att atw aw- awa awb awd awo awr awt aww baa bab bad bao bar bat baw bba bbb bbd bbo bbr bbt bbw bda bdb bdd bdo bdr bdt bdw boa bob bod boo bor bot bow bra brb brd bro brr brt brw bta btb btd bto btr btt btw bwa bwb bwd bwo bwr daa dab dad dao dar dat daw dba dbb dbd dbo dbr dbt dda ddb ddd ddo ddr ddt ddw doa dob dod doo dor dot dow dra drb drd dro drr drt drw dta dtb dtd dto dtr dtt dtw dwa dwb dwo dwr dwt dww oaa oab oad oao oar oat oaw ob- oba obb obd obo obr obt obw oda odb odd odo odr odt oo- ooa oob ood ooo oor oot oow or- ora orb ord oro orr ort ot- ota otb otd oto otr ott otw owa owb owd owo owt oww ra- raa rab rad rao rar rat raw rba rbb rbd rbo rbr rbt rbw rda rdb rdd rdo rdr rdt roa rob rod roo ror rot row rra rrb rrd rrr rrt rta rtb rtd rto rtr rtt rtw rwa rwb rwd rwr taa tab tad tao tar tat taw tba tbb tbd tbo tbr tbt tda tdb tdd tdo tdr tdt tdw to- toa tob tod too tor tot tow tra trb trd tro trr trt trw tta ttb ttd tto ttr ttt ttw twa twb twd two twr twt tww waa wab wad wao war wat waw wba wbb wbd wbo wbr wbt wbw wda wdb wdr wdt woa wob wod woo wor wot wow wr- wra wrd wro wrr wrt wrw wta wtb wtd wto wtr wtt wtw wwa wwd wwo wwt www