iabti aibti ibati biati abiti baiti iatbi aitbi itabi tiabi atibi taibi ibtai bitai itbai tibai btiai tbiai abtii batii atbii tabii btaii tbaii iabit aibit ibait biait abiit baiit iaibt aiibt iiabt iiabt aiibt iaibt ibiat biiat iibat iibat biiat ibiat abiit baiit aibit iabit biait ibait iatib aitib itaib tiaib atiib taiib iaitb aiitb iiatb iiatb aiitb iaitb itiab tiiab iitab iitab tiiab itiab atiib taiib aitib iatib tiaib itaib ibtia bitia itbia tibia btiia tbiia ibita biita iibta iibta biita ibita itiba tiiba iitba iitba tiiba itiba btiia tbiia bitia ibtia tibia itbia abtii batii atbii tabii btaii tbaii abiti baiti aibti iabti biati ibati atibi taibi aitbi iatbi tiabi itabi btiai tbiai bitai ibtai tibai itbai
Note: these 'words' (valid or invalid) are all the permutations of the word iabti. These words are obtained by scrambling the letters in iabti.