-er a-a a-t aaa aad aae aap aar aat ad- ada add ade adp adr adt aea aed aee aep aer aet ap- apa apd ape app apr apt ar- ara ard are arp arr art at- ata atd ate atp atr att daa dad dae dap dar dat dda ddd dde ddp ddr ddt de- dea ded dee dep der det dpa dpd dpe dpp dpr dpt dra drd dre drp drr drt dta dtd dte dtp dtr dtt eaa ead eae eap ear eat ed- eda edd ede edp edr edt eea eed eee eep eer eet ep- epa epd epe epp epr ept era erd ere erp err ert eta etd ete etp etr ett p-p paa pad pae pap par pat pda pdd pde pdp pdr pdt pea ped pee pep per pet ppa ppd ppe ppp ppr ppt pra prd pre prp prr prt pt- pta ptd pte ptp ptr ptt ra- raa rad rae rap rar rat rda rdd rde rdp rdr rdt re- rea red ree rep rer ret rpa rpd rpe rpp rpr rpt rra rrd rrp rrr rrt rta rtd rte rtp rtr rtt taa tad tae tap tar tat tda tdd tde tdp tdr tdt te- tea ted tee tep ter tet tpa tpd tpe tpp tpr tpt tra trd tre trp trr trt tta ttd tte ttp ttr ttt