>>> print(L[0][0])
Apple
>>> print(L[1][1])
Python
>>> print(L[2][2])
Lisa
>>> print(L[-3][-3])
>>> print(L[-2][-3])
>>> print(L[-1][-1])
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清寒藏韵
>>> print(L[0][0])
Apple
>>> print(L[1][1])
Python
>>> print(L[2][2])
Lisa
>>> print(L[2][2])
Lisa
>>> print(L[-3][-3])
Apple
>>> print(L[-2][-3])
Python
>>> print(L[-1][-1])
Lisa