
    Calculate the total exposure surface area of a credit risk tier cube, where each face represents identical credit score segment boundaries, given the standardized segment length used by the bank's risk assessment system. The exposure surface area excludes the top and bottom faces of the risk cube, as these represent the fixed score boundaries that separate adjacent risk tiers.
    

    
def lateralsurface_cube(l):
    """
    Calculate the total exposure surface area of a credit risk tier cube, where each face represents identical credit score segment boundaries, given the standardized segment length used by the bank's risk assessment system. The exposure surface area excludes the top and bottom faces of the risk cube, as these represent the fixed score boundaries that separate adjacent risk tiers.
    

    """
def lateralsurface_cube(l):
    """
    Calculate the total exposure surface area of a credit risk tier cube, where each face represents identical credit score segment boundaries, given the standardized segment length used by the bank's risk assessment system. The exposure surface area excludes the top and bottom faces of the risk cube, as these represent the fixed score boundaries that separate adjacent risk tiers.
    

    """
    LSA = 4 * (l * l)
    return LSA