a-a a-t aaa aad aaf aar aat aau aax ad- ada add adf adr adt adu adx af- afa afd aff afr aft afu afx ar- ara ard arf arr art aru arx at- ata atd atf atr att atu atx au- aua aud auf aur aut aux ax- axa axr axt axx daa dad daf dar dat dau dax dda ddd ddf ddr ddt ddu ddx dfa dfd dff dfr dft dfu dfx dra drd drr drt dru drx dta dtd dtf dtr dtt dtu dtx dua dud duf dur dut dux dxd dxr dxt dxx faa fad faf far fat fau fax fda fdd fdf fdr fdt fdu fdx ffa ffd fff ffr fft ffu ffx fra frd frf frr frt fru fta ftd ftf ftr ftt ftu ftx fua fud fuf fur fut fuu fux fxr fxt fxu fxx ra- raa rad raf rar rat rau rax rda rdd rdf rdr rdt rdu rdx rfa rfd rff rfr rft rfu rra rrd rrf rrr rrt rru rta rtd rtf rtr rtt rtu rtx rua rud ruf rur rut ruu rux rxr t-x taa tad taf tar tat tau tax tda tdd tdf tdr tdt tdu tdx tfa tfd tff tfr tft tfu tfx tra trd trf trr trt tru trx tta ttd ttf ttr ttt ttu ttx tua tud tuf tur tut tuu tux txf txt txu ua- uaa uad uaf uar uat uau uda udd udf udr udt udu udx ufa ufd uff ufr uft ufu ufx ur- ura urd urf urr urt uru urx uta utd utf utr utt utu utx uua uur uut uuu uxf uxr uxt uxu xaa xad xaf xar xat xau xda xdf xdr xdt xfa xft xfx xrd xrf xrt xrx xtf xtr xtx xxx