-er eee eef eep eer ef- efe eff efp efr ep- epe epf epp epr ere erf erp err fee fef fep fer ffe fff ffp ffr fpe fpp fpr fre frf frp frr p-p pee pef pep per pfe pff pfp pfr ppe ppf ppp ppr pre prf prp prr re- ree ref rep rer rfe rff rfp rfr rpe rpf rpp rpr rrf rrp rrr

eeee eefe epee eper eppp eprp erer erpe erre feer fefe feff fere ferr ffee ffff ffrr fprf free frep peep peer peff pepe per- pere perf perp perr pfff pffr pper pppp pprf pre- pree pref prep reef reep refe reff refr repe repp repr rere rfef rrrr

eeeee eepee efere effer erere feere ferr- ferre freep freer frere p-rep peere pepee peppe perer perre preef preff reefe reepe reere refer reffe reppe rere- reree rperf

effere ferfer ferrer freepr frefre peepee peeper peerer peffer pepper perere perper perree pppppp prefer preffe reefer reeffe reeper refeff repper repref

ferrere freeppp pee-pee pfeffer preferr preffer prepere prepper referee referer repreef reprefe rerefer

peeppeep pepperer perrerer preferee referree referrer

preferree preferrer repe-refe