# 打印Apple:
print(L[0][0])
# 打印Python:
print(L[1][1])
# 打印Lisa:
print(L[-1][-1])
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断了的弦222
# 打印Apple:
print(L[0][0])
# 打印Python:
print(L[1][1])
# 打印Lisa:
print(L[-1][-1])