abmda bamda ambda mabda bmada mbada abdma badma adbma dabma bdama dbama amdba madba admba damba mdaba dmaba bmdaa mbdaa bdmaa dbmaa mdbaa dmbaa abmad bamad ambad mabad bmaad mbaad abamd baamd aabmd aabmd baamd abamd amabd maabd aambd aambd maabd amabd bmaad mbaad bamad abmad mabad ambad abdam badam adbam dabam bdaam dbaam abadm baadm aabdm aabdm baadm abadm adabm daabm aadbm aadbm daabm adabm bdaam dbaam badam abdam dabam adbam amdab madab admab damab mdaab dmaab amadb maadb aamdb aamdb maadb amadb adamb daamb aadmb aadmb daamb adamb mdaab dmaab madab amdab damab admab bmdaa mbdaa bdmaa dbmaa mdbaa dmbaa bmada mbada bamda abmda mabda ambda bdama dbama badma abdma dabma adbma mdaba dmaba madba amdba damba admba
Note: these 'words' (valid or invalid) are all the permutations of the word abmda. These words are obtained by scrambling the letters in abmda.