'''
Write a program to swap odd and even bits in an integer with as few instructions as possible (e.g. bit 0 and bit 1 are swapped, bit 2 and bit 3 are swapped, and so on).

Hints: 145, 248, 328, 355
'''


def pairwise_swap(s):
    pass

if __name__ == '__main__':
    assert pairwise_swap('') ==
    assert pairwise_swap('') ==
    assert pairwise_swap('') ==
    assert pairwise_swap('') ==
    assert pairwise_swap('') ==
