ndals dnals nadls andls danls adnls ndlas dnlas nldas lndas dlnas ldnas nalds anlds nlads lnads alnds lands dalns adlns dlans ldans aldns ladns ndasl dnasl nadsl andsl dansl adnsl ndsal dnsal nsdal sndal dsnal sdnal nasdl ansdl nsadl snadl asndl sandl dasnl adsnl dsanl sdanl asdnl sadnl ndlsa dnlsa nldsa lndsa dlnsa ldnsa ndsla dnsla nsdla sndla dsnla sdnla nlsda lnsda nslda snlda lsnda slnda dlsna ldsna dslna sdlna lsdna sldna nalsd anlsd nlasd lnasd alnsd lansd nasld ansld nsald snald asnld sanld nlsad lnsad nslad snlad lsnad slnad alsnd lasnd aslnd salnd lsand sland dalsn adlsn dlasn ldasn aldsn ladsn dasln adsln dsaln sdaln asdln sadln dlsan ldsan dslan sdlan lsdan sldan alsdn lasdn asldn saldn lsadn sladn
Note: these 'words' (valid or invalid) are all the permutations of the word ndals. These words are obtained by scrambling the letters in ndals.