borts obrts brots rbots orbts robts botrs obtrs btors tbors otbrs tobrs brtos rbtos btros tbros rtbos trbos ortbs rotbs otrbs torbs rtobs trobs borst obrst brost rbost orbst robst bosrt obsrt bsort sbort osbrt sobrt brsot rbsot bsrot sbrot rsbot srbot orsbt rosbt osrbt sorbt rsobt srobt botsr obtsr btosr tbosr otbsr tobsr bostr obstr bsotr sbotr osbtr sobtr btsor tbsor bstor sbtor tsbor stbor otsbr tosbr ostbr sotbr tsobr stobr brtso rbtso btrso tbrso rtbso trbso brsto rbsto bsrto sbrto rsbto srbto btsro tbsro bstro sbtro tsbro stbro rtsbo trsbo rstbo srtbo tsrbo strbo ortsb rotsb otrsb torsb rtosb trosb orstb rostb osrtb sortb rsotb srotb otsrb tosrb ostrb sotrb tsorb storb rtsob trsob rstob srtob tsrob strob
Note: these 'words' (valid or invalid) are all the permutations of the word borts. These words are obtained by scrambling the letters in borts.