bawls abwls bwals wbals awbls wabls balws ablws blaws lbaws albws labws bwlas wblas blwas lbwas wlbas lwbas awlbs walbs alwbs lawbs wlabs lwabs bawsl abwsl bwasl wbasl awbsl wabsl baswl abswl bsawl sbawl asbwl sabwl bwsal wbsal bswal sbwal wsbal swbal awsbl wasbl aswbl sawbl wsabl swabl balsw ablsw blasw lbasw albsw labsw baslw abslw bsalw sbalw asblw sablw blsaw lbsaw bslaw sblaw lsbaw slbaw alsbw lasbw aslbw salbw lsabw slabw bwlsa wblsa blwsa lbwsa wlbsa lwbsa bwsla wbsla bswla sbwla wsbla swbla blswa lbswa bslwa sblwa lsbwa slbwa wlsba lwsba wslba swlba lswba slwba awlsb walsb alwsb lawsb wlasb lwasb awslb waslb aswlb sawlb wsalb swalb alswb laswb aslwb salwb lsawb slawb wlsab lwsab wslab swlab lswab slwab
Note: these 'words' (valid or invalid) are all the permutations of the word bawls. These words are obtained by scrambling the letters in bawls.