hadal ahdal hdaal dhaal adhal dahal haadl ahadl haadl ahadl aahdl aahdl hdaal dhaal hadal ahdal dahal adhal adahl daahl aadhl aadhl daahl adahl hadla ahdla hdala dhala adhla dahla halda ahlda hlada lhada alhda lahda hdlaa dhlaa hldaa lhdaa dlhaa ldhaa adlha dalha aldha ladha dlaha ldaha haald ahald haald ahald aahld aahld halad ahlad hlaad lhaad alhad lahad halad ahlad hlaad lhaad alhad lahad aalhd aalhd alahd laahd alahd laahd hdala dhala hadla ahdla dahla adhla hdlaa dhlaa hldaa lhdaa dlhaa ldhaa halda ahlda hlada lhada alhda lahda dalha adlha dlaha ldaha aldha ladha adalh daalh aadlh aadlh daalh adalh adlah dalah aldah ladah dlaah ldaah aaldh aaldh aladh laadh aladh laadh dalah adlah dlaah ldaah aldah ladah
Note: these 'words' (valid or invalid) are all the permutations of the word hadal. These words are obtained by scrambling the letters in hadal.