gecks egcks gceks cgeks ecgks cegks gekcs egkcs gkecs kgecs ekgcs kegcs gckes cgkes gkces kgces ckges kcges eckgs cekgs ekcgs kecgs ckegs kcegs gecsk egcsk gcesk cgesk ecgsk cegsk gesck egsck gseck sgeck esgck segck gcsek cgsek gscek sgcek csgek scgek ecsgk cesgk escgk secgk csegk scegk geksc egksc gkesc kgesc ekgsc kegsc geskc egskc gsekc sgekc esgkc segkc gksec kgsec gskec sgkec ksgec skgec eksgc kesgc eskgc sekgc ksegc skegc gckse cgkse gkcse kgcse ckgse kcgse gcske cgske gscke sgcke csgke scgke gksce kgsce gskce sgkce ksgce skgce cksge kcsge cskge sckge kscge skcge ecksg ceksg ekcsg kecsg ckesg kcesg ecskg ceskg esckg seckg csekg scekg ekscg kescg eskcg sekcg ksecg skecg ckseg kcseg cskeg sckeg ksceg skceg
Note: these 'words' (valid or invalid) are all the permutations of the word gecks. These words are obtained by scrambling the letters in gecks.