ottos totos ottos totos ttoos ttoos otots toots ootts ootts toots otots otots toots ootts ootts toots otots ttoos ttoos totos ottos totos ottos ottso totso ottso totso ttoso ttoso otsto tosto ostto sotto tsoto stoto otsto tosto ostto sotto tsoto stoto ttsoo ttsoo tstoo sttoo tstoo sttoo otost toost ootst ootst toost otost otsot tosot ostot sotot tsoot stoot oostt oostt osott soott osott soott tosot otsot tsoot stoot ostot sotot otost toost ootst ootst toost otost otsot tosot ostot sotot tsoot stoot oostt oostt osott soott osott soott tosot otsot tsoot stoot ostot sotot ttoso ttoso totso ottso totso ottso ttsoo ttsoo tstoo sttoo tstoo sttoo tosto otsto tsoto stoto ostto sotto tosto otsto tsoto stoto ostto sotto
Note: these 'words' (valid or invalid) are all the permutations of the word ottos. These words are obtained by scrambling the letters in ottos.