n-p-n nnooo no-no no-op non-u nonno nonop noonu nopun noron norro norun nu-nu nunon nunun nuoro nupur nurun onoon onorn onour onpop ooooo oppon ornon orono oruro ouoro ourno p-n-p po-on po-po ponnu ponor ponup poopo popon popop poppo popup porn- porno poro- poron porro porur proor prop- propn propp propr prun- pruno punon puppo puro- ro-ro ronno rprop runo- runon runup u-pop unnun unnur unoor unorn unrun unurn upnor uppon uprun urour uuuuu