latch altch ltach tlach atlch talch lacth alcth lcath clath aclth calth ltcah tlcah lctah cltah tclah ctlah atclh taclh actlh catlh tcalh ctalh lathc althc ltahc tlahc atlhc talhc lahtc alhtc lhatc hlatc ahltc haltc lthac tlhac lhtac hltac thlac htlac athlc tahlc ahtlc hatlc thalc htalc lacht alcht lcaht claht aclht calht lahct alhct lhact hlact ahlct halct lchat clhat lhcat hlcat chlat hclat achlt cahlt ahclt haclt chalt hcalt ltcha tlcha lctha cltha tclha ctlha lthca tlhca lhtca hltca thlca htlca lchta clhta lhcta hlcta chlta hclta tchla cthla thcla htcla chtla hctla atchl tachl acthl cathl tcahl ctahl athcl tahcl ahtcl hatcl thacl htacl achtl cahtl ahctl hactl chatl hcatl tchal cthal thcal htcal chtal hctal
Note: these 'words' (valid or invalid) are all the permutations of the word latch. These words are obtained by scrambling the letters in latch.