clean_list_save_structure

def clean_list(_list):
    outlist = list()
    for i in _list:
        if type(i) != list:
            outlist.append(i)
        else:
            intern_list = clean_list(set(i))
            outlist.append(intern_list)
    return outlist


test_list = [["a","a","b","b","c","c"],["a","a","x","x","y","y"]]
#test_list = ["a", ["b","b"]]

OUT =  clean_list(test_list)