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