def transform_dotted_decimal_to_mac(dotted_decimal_mac):
    """
    Method to transform dotted decimals to Mac address
    Args:
        dotted_decimal_mac(string): dotted decimal string
    Returns:
        mac_address(string): Mac address separated by colon
    """

    decimal_mac = dotted_decimal_mac.split(u'.')
    hex_mac = u':'.join(str(hex(int(i)).lstrip(u'0x')).zfill(2) for i in decimal_mac).upper()
    return hex_mac