rbdpe brdpe rdbpe drbpe bdrpe dbrpe rbpde brpde rpbde prbde bprde pbrde rdpbe drpbe rpdbe prdbe dprbe pdrbe bdpre dbpre bpdre pbdre dpbre pdbre rbdep brdep rdbep drbep bdrep dbrep rbedp bredp rebdp erbdp berdp ebrdp rdebp drebp redbp erdbp derbp edrbp bderp dberp bedrp ebdrp debrp edbrp rbped brped rpbed prbed bpred pbred rbepd brepd rebpd erbpd berpd ebrpd rpebd prebd repbd erpbd perbd eprbd bperd pberd beprd ebprd pebrd epbrd rdpeb drpeb rpdeb prdeb dpreb pdreb rdepb drepb redpb erdpb derpb edrpb rpedb predb repdb erpdb perdb eprdb dperb pderb deprb edprb pedrb epdrb bdper dbper bpder pbder dpber pdber bdepr dbepr bedpr ebdpr debpr edbpr bpedr pbedr bepdr ebpdr pebdr epbdr dpebr pdebr depbr edpbr pedbr epdbr
Note: these 'words' (valid or invalid) are all the permutations of the word rbdpe. These words are obtained by scrambling the letters in rbdpe.