osdot sodot odsot dosot sdoot dsoot osodt soodt oosdt oosdt soodt osodt odost doost oodst oodst doost odost sdoot dsoot sodot osdot dosot odsot osdto sodto odsto dosto sdoto dsoto ostdo sotdo otsdo tosdo stodo tsodo odtso dotso otdso todso dtoso tdoso sdtoo dstoo stdoo tsdoo dtsoo tdsoo osotd sootd oostd oostd sootd osotd ostod sotod otsod tosod stood tsood ootsd ootsd otosd toosd otosd toosd sotod ostod stood tsood otsod tosod odots doots oodts oodts doots odots odtos dotos otdos todos dtoos tdoos ootds ootds otods toods otods toods dotos odtos dtoos tdoos otdos todos sdoto dsoto sodto osdto dosto odsto sdtoo dstoo stdoo tsdoo dtsoo tdsoo sotdo ostdo stodo tsodo otsdo tosdo dotso odtso dtoso tdoso otdso todso
Note: these 'words' (valid or invalid) are all the permutations of the word osdot. These words are obtained by scrambling the letters in osdot.