a-a a-t aaa aad aao aap aar aat ad- ada add ado adp adr adt aoa aod aoo aop aor aot ap- apa apd apo app apr apt ar- ara ard aro arp arr art at- ata atd ato atp atr att daa dad dao dap dar dat dda ddd ddo ddp ddr ddt doa dod doo dop dor dot dpa dpd dpo dpp dpr dpt dra drd dro drp drr drt dta dtd dto dtp dtr dtt oaa oad oao oap oar oat oda odd odo odp odr odt oo- ooa ood ooo oop oor oot op- opa opd opo opp opr opt or- ora ord oro orp orr ort ot- ota otd oto otp otr ott p-p paa pad pao pap par pat pda pdd pdo pdp pdr pdt poa pod poo pop por pot ppa ppd ppo ppp ppr ppt pra prd pro prp prr prt pt- pta ptd pto ptp ptr ptt ra- raa rad rao rap rar rat rda rdd rdo rdp rdr rdt roa rod roo rop ror rot rpa rpd rpo rpp rpr rpt rra rrd rrp rrr rrt rta rtd rto rtp rtr rtt taa tad tao tap tar tat tda tdd tdo tdp tdr tdt to- toa tod too top tor tot tpa tpd tpo tpp tpr tpt tra trd tro trp trr trt tta ttd tto ttp ttr ttt