a-a a-t aaa aao aap aar aat aoa aoo aop aor aot ap- apa apo app apr apt ar- ara aro arp arr art at- ata ato atp atr att oaa oao oap oar oat oo- ooa ooo oop oor oot op- opa opo opp opr opt or- ora oro orp orr ort ot- ota oto otp otr ott p-p paa pao pap par pat poa poo pop por pot ppa ppo ppp ppr ppt pra pro prp prr prt pt- pta pto ptp ptr ptt ra- raa rao rap rar rat roa roo rop ror rot rpa rpo rpp rpr rpt rra rrp rrr rrt rta rto rtp rtr rtt taa tao tap tar tat to- toa too top tor tot tpa tpo tpp tpr tpt tra tro trp trr trt tta tto ttp ttr ttt