两种搭法，同一张表
运行下面这段程序，填写它打印出来的结果。
def f1(a, b):
return (a & (1 - b)) | ((1 - a) & b)
def f2(a, b):
return (a | b) & (1 - (a & b))
t1 = "".join(str(f1(a, b)) for a in (0, 1) for b in (0, 1))
t2 = "".join(str(f2(a, b)) for a in (0, 1) for b in (0, 1))
print(t1 + "/" + t2)
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