obits boits oibts iobts biots ibots obtis botis otbis tobis btois tbois oitbs iotbs otibs toibs itobs tiobs bitos ibtos btios tbios itbos tibos obist boist oibst iobst biost ibost obsit bosit osbit sobit bsoit sboit oisbt iosbt osibt soibt isobt siobt bisot ibsot bsiot sbiot isbot sibot obtsi botsi otbsi tobsi btosi tbosi obsti bosti osbti sobti bsoti sboti otsbi tosbi ostbi sotbi tsobi stobi btsoi tbsoi bstoi sbtoi tsboi stboi oitsb iotsb otisb toisb itosb tiosb oistb iostb ositb soitb isotb siotb otsib tosib ostib sotib tsoib stoib itsob tisob istob sitob tsiob stiob bitso ibtso btiso tbiso itbso tibso bisto ibsto bsito sbito isbto sibto btsio tbsio bstio sbtio tsbio stbio itsbo tisbo istbo sitbo tsibo stibo
Note: these 'words' (valid or invalid) are all the permutations of the word obits. These words are obtained by scrambling the letters in obits.