a = [["a","d"],["a","g","d"],"b","c","e","f",["g"],"g"]
b = [["g"],"g",["a","d"],["a","g","d"],["b","c","e","f"],["b","c","e","f","g"],["a","b","c","d","e","f","g"],["a","b","c","d","e","f"],["c","f","g"],["b","e","f"],["c","e"],["b","e"],["a","c","d","f"],["a","b","d","e"],["a","b","d","e","g"],["a","c","d","f","g"]]
print([value for value in a if value in b])