octal cotal otcal tocal ctoal tcoal ocatl coatl oactl aoctl caotl acotl otacl toacl oatcl aotcl taocl atocl ctaol tcaol catol actol tacol atcol octla cotla otcla tocla ctola tcola oclta colta olcta locta clota lcota otlca tolca oltca lotca tloca ltoca ctloa tcloa cltoa lctoa tlcoa ltcoa ocalt coalt oaclt aoclt caolt acolt oclat colat olcat locat cloat lcoat oalct aolct olact loact aloct laoct calot aclot claot lcaot alcot lacot otalc toalc oatlc aotlc taolc atolc otlac tolac oltac lotac tloac ltoac oaltc aoltc olatc loatc alotc laotc taloc atloc tlaoc ltaoc altoc latoc ctalo tcalo catlo actlo taclo atclo ctlao tclao cltao lctao tlcao ltcao calto aclto clato lcato alcto lacto talco atlco tlaco ltaco altco latco
Note: these 'words' (valid or invalid) are all the permutations of the word octal. These words are obtained by scrambling the letters in octal.