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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 get_forward_returns_columns(columns):
 """ Utility that detects and returns the columns that are forward returns """

    pattern = re.compile(r"^(\d+([Dhms]|ms|us|ns))+$", re.IGNORECASE)
    valid_columns = [(pattern.match(col) is not None) for col in columns]
    return columns[valid_columns]