a-a a-t aaa aad aao aar aat ad- ada add ado adr adt aoa aod aoo aor aot ar- ara ard aro arr art at- ata atd ato atr att daa dad dao dar dat dda ddd ddo ddr ddt doa dod doo dor dot dra drd dro drr drt dta dtd dto dtr dtt oaa oad oao oar oat oda odd odo odr odt oo- ooa ood ooo oor oot or- ora ord oro orr ort ot- ota otd oto otr ott ra- raa rad rao rar rat rda rdd rdo rdr rdt roa rod roo ror rot rra rrd rrr rrt rta rtd rto rtr rtt taa tad tao tar tat tda tdd tdo tdr tdt to- toa tod too tor tot tra trd tro trr trt tta ttd tto ttr ttt