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from calendar import monthrange
from datetime import datetime, timedelta


def month_boundaries(year, month):
    start = datetime(year, month, 1)
    month_days = monthrange(year, month)[1]
    return [start, start + timedelta(days=month_days, seconds=-1)]


if __name__ == '__main__':
    import sys
    print(month_boundaries(int(sys.argv[1]), int(sys.argv[2])))