e-pro eeeee eepee eorre erere eroor erore error exore exper oeppo oo-er ooooo opepe opere opper oreo- orere orero orexo oroer p-o-x p-rep peere pepee peppe perer perox perre perro po-po pooer poope poopo poore poper popex popop poppe poppo porer poro- porro pppox preop proer proor prop- prope propp propr prore reepe reere reorx repop repor reppe repro rere- reree rexer ro-ro roero rooer roope roore roper roppe rorer rprop xero- xerox xexex xorro xoxox