coach ocach caoch acoch oacch aocch cocah occah ccoah ccoah occah cocah cacoh accoh ccaoh ccaoh accoh cacoh oacch aocch ocach coach acoch caoch coahc ocahc caohc acohc oachc aochc cohac ochac choac hcoac ohcac hocac cahoc achoc chaoc hcaoc ahcoc hacoc oahcc aohcc ohacc hoacc ahocc haocc cocha occha ccoha ccoha occha cocha cohca ochca choca hcoca ohcca hocca cchoa cchoa chcoa hccoa chcoa hccoa ochca cohca ohcca hocca choca hcoca cacho accho ccaho ccaho accho cacho cahco achco chaco hcaco ahcco hacco cchao cchao chcao hccao chcao hccao achco cahco ahcco hacco chaco hcaco oachc aochc ocahc coahc acohc caohc oahcc aohcc ohacc hoacc ahocc haocc ochac cohac ohcac hocac choac hcoac achoc cahoc ahcoc hacoc chaoc hcaoc
Note: these 'words' (valid or invalid) are all the permutations of the word coach. These words are obtained by scrambling the letters in coach.