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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def strxor(s1, s2):
 """ Returns the binary XOR of the 2 provided strings s1 and s2. s1 and s2 must be of same length. """

    return b"".join(map(lambda x, y: chb(orb(x) ^ orb(y)), s1, s2))