havoc ahvoc hvaoc vhaoc avhoc vahoc haovc ahovc hoavc ohavc aohvc oahvc hvoac vhoac hovac ohvac vohac ovhac avohc vaohc aovhc oavhc voahc ovahc havco ahvco hvaco vhaco avhco vahco hacvo ahcvo hcavo chavo achvo cahvo hvcao vhcao hcvao chvao vchao cvhao avcho vacho acvho cavho vcaho cvaho haocv ahocv hoacv ohacv aohcv oahcv hacov ahcov hcaov chaov achov cahov hocav ohcav hcoav choav ochav cohav aochv oachv acohv caohv ocahv coahv hvoca vhoca hovca ohvca vohca ovhca hvcoa vhcoa hcvoa chvoa vchoa cvhoa hocva ohcva hcova chova ochva cohva vocha ovcha vcoha cvoha ocvha covha avoch vaoch aovch oavch voach ovach avcoh vacoh acvoh cavoh vcaoh cvaoh aocvh oacvh acovh caovh ocavh coavh vocah ovcah vcoah cvoah ocvah covah
Note: these 'words' (valid or invalid) are all the permutations of the word havoc. These words are obtained by scrambling the letters in havoc.