-er a-a a-t aaa aae aap aar aat aea aee aep aer aet ap- apa ape app apr apt ar- ara are arp arr art at- ata ate atp atr att eaa eae eap ear eat eea eee eep eer eet ep- epa epe epp epr ept era ere erp err ert eta ete etp etr ett p-p paa pae pap par pat pea pee pep per pet ppa ppe ppp ppr ppt pra pre prp prr prt pt- pta pte ptp ptr ptt ra- raa rae rap rar rat re- rea ree rep rer ret rpa rpe rpp rpr rpt rra rrp rrr rrt rta rte rtp rtr rtt taa tae tap tar tat te- tea tee tep ter tet tpa tpe tpp tpr tpt tra tre trp trr trt tta tte ttp ttr ttt