yapok aypok ypaok pyaok apyok payok yaopk ayopk yoapk oyapk aoypk oaypk ypoak pyoak yopak oypak poyak opyak apoyk paoyk aopyk oapyk poayk opayk yapko aypko ypako pyako apyko payko yakpo aykpo ykapo kyapo akypo kaypo ypkao pykao ykpao kypao pkyao kpyao apkyo pakyo akpyo kapyo pkayo kpayo yaokp ayokp yoakp oyakp aoykp oaykp yakop aykop ykaop kyaop akyop kayop yokap oykap ykoap kyoap okyap koyap aokyp oakyp akoyp kaoyp okayp koayp ypoka pyoka yopka oypka poyka opyka ypkoa pykoa ykpoa kypoa pkyoa kpyoa yokpa oykpa ykopa kyopa okypa koypa pokya opkya pkoya kpoya okpya kopya apoky paoky aopky oapky poaky opaky apkoy pakoy akpoy kapoy pkaoy kpaoy aokpy oakpy akopy kaopy okapy koapy pokay opkay pkoay kpoay okpay kopay
Note: these 'words' (valid or invalid) are all the permutations of the word yapok. These words are obtained by scrambling the letters in yapok.