kerns ekrns krens rkens erkns rekns kenrs eknrs kners nkers enkrs nekrs krnes rknes knres nkres rnkes nrkes ernks renks enrks nerks rneks nreks kersn ekrsn kresn rkesn erksn reksn kesrn eksrn ksern skern eskrn sekrn krsen rksen ksren skren rsken srken erskn reskn esrkn serkn rsekn srekn kensr eknsr knesr nkesr enksr neksr kesnr eksnr ksenr skenr esknr seknr knser nkser ksner skner nsker snker enskr neskr esnkr senkr nsekr snekr krnse rknse knrse nkrse rnkse nrkse krsne rksne ksrne skrne rskne srkne knsre nksre ksnre sknre nskre snkre rnske nrske rsnke srnke nsrke snrke ernsk rensk enrsk nersk rnesk nresk ersnk resnk esrnk sernk rsenk srenk ensrk nesrk esnrk senrk nserk snerk rnsek nrsek rsnek srnek nsrek snrek
Note: these 'words' (valid or invalid) are all the permutations of the word kerns. These words are obtained by scrambling the letters in kerns.