octan cotan otcan tocan ctoan tcoan ocatn coatn oactn aoctn caotn acotn otacn toacn oatcn aotcn taocn atocn ctaon tcaon caton acton tacon atcon octna cotna otcna tocna ctona tcona ocnta conta oncta nocta cnota ncota otnca tonca ontca notca tnoca ntoca ctnoa tcnoa cntoa nctoa tncoa ntcoa ocant coant oacnt aocnt caont acont ocnat conat oncat nocat cnoat ncoat oanct aonct onact noact anoct naoct canot acnot cnaot ncaot ancot nacot otanc toanc oatnc aotnc taonc atonc otnac tonac ontac notac tnoac ntoac oantc aontc onatc noatc anotc naotc tanoc atnoc tnaoc ntaoc antoc natoc ctano tcano catno actno tacno atcno ctnao tcnao cntao nctao tncao ntcao canto acnto cnato ncato ancto nacto tanco atnco tnaco ntaco antco natco
Note: these 'words' (valid or invalid) are all the permutations of the word octan. These words are obtained by scrambling the letters in octan.