whens hwens wehns ewhns hewns ehwns whnes hwnes wnhes nwhes hnwes nhwes wenhs ewnhs wnehs nwehs enwhs newhs henws ehnws hnews nhews enhws nehws whesn hwesn wehsn ewhsn hewsn ehwsn whsen hwsen wshen swhen hswen shwen weshn ewshn wsehn swehn eswhn sewhn heswn ehswn hsewn shewn eshwn sehwn whnse hwnse wnhse nwhse hnwse nhwse whsne hwsne wshne swhne hswne shwne wnshe nwshe wsnhe swnhe nswhe snwhe hnswe nhswe hsnwe shnwe nshwe snhwe wensh ewnsh wnesh nwesh enwsh newsh wesnh ewsnh wsenh swenh eswnh sewnh wnseh nwseh wsneh swneh nsweh snweh enswh neswh esnwh senwh nsewh snewh hensw ehnsw hnesw nhesw enhsw nehsw hesnw ehsnw hsenw shenw eshnw sehnw hnsew nhsew hsnew shnew nshew snhew enshw neshw esnhw senhw nsehw snehw
Note: these 'words' (valid or invalid) are all the permutations of the word whens. These words are obtained by scrambling the letters in whens.