oncet nocet ocnet conet ncoet cnoet onect noect oenct eonct neoct enoct ocent coent oecnt eocnt ceont econt nceot cneot necot encot cenot ecnot oncte nocte ocnte conte ncote cnote ontce notce otnce tonce ntoce tnoce octne cotne otcne tocne ctone tcone nctoe cntoe ntcoe tncoe ctnoe tcnoe onetc noetc oentc eontc neotc enotc ontec notec otnec tonec ntoec tnoec oetnc eotnc otenc toenc etonc teonc netoc entoc nteoc tneoc etnoc tenoc ocetn coetn oectn eoctn ceotn ecotn octen coten otcen tocen ctoen tcoen oetcn eotcn otecn toecn etocn teocn ceton ecton cteon tceon etcon tecon nceto cneto necto encto cento ecnto ncteo cnteo ntceo tnceo ctneo tcneo netco entco nteco tneco etnco tenco cetno ectno cteno tceno etcno tecno
Note: these 'words' (valid or invalid) are all the permutations of the word oncet. These words are obtained by scrambling the letters in oncet.