tacho atcho tcaho ctaho actho catho tahco athco thaco htaco ahtco hatco tchao cthao thcao htcao chtao hctao achto cahto ahcto hacto chato hcato tacoh atcoh tcaoh ctaoh actoh catoh taoch atoch toach otach aotch oatch tcoah ctoah tocah otcah cotah octah acoth caoth aocth oacth coath ocath tahoc athoc thaoc htaoc ahtoc hatoc taohc atohc toahc otahc aothc oathc thoac htoac tohac othac hotac ohtac ahotc haotc aohtc oahtc hoatc ohatc tchoa cthoa thcoa htcoa chtoa hctoa tcoha ctoha tocha otcha cotha octha thoca htoca tohca othca hotca ohtca chota hcota cohta ochta hocta ohcta achot cahot ahcot hacot chaot hcaot acoht caoht aocht oacht coaht ocaht ahoct haoct aohct oahct hoact ohact choat hcoat cohat ochat hocat ohcat
Note: these 'words' (valid or invalid) are all the permutations of the word tacho. These words are obtained by scrambling the letters in tacho.