betas ebtas bteas tbeas etbas tebas beats ebats baets abets eabts aebts btaes tbaes bates abtes tabes atbes etabs teabs eatbs aetbs taebs atebs betsa ebtsa btesa tbesa etbsa tebsa besta ebsta bseta sbeta esbta sebta btsea tbsea bstea sbtea tsbea stbea etsba tesba estba setba tseba steba beast ebast baest abest eabst aebst besat ebsat bseat sbeat esbat sebat baset abset bsaet sbaet asbet sabet easbt aesbt esabt seabt asebt saebt btase tbase batse abtse tabse atbse btsae tbsae bstae sbtae tsbae stbae baste abste bsate sbate asbte sabte tasbe atsbe tsabe stabe astbe satbe etasb teasb eatsb aetsb taesb atesb etsab tesab estab setab tseab steab eastb aestb esatb seatb asetb saetb taseb atseb tsaeb staeb asteb sateb
Note: these 'words' (valid or invalid) are all the permutations of the word betas. These words are obtained by scrambling the letters in betas.