a = float(input("Enter the length of the first side: "))
b = float(input("Enter the length of the second side: "))
c = float(input("Enter the length of the third side: "))

if a == b == c:
    print("Equilateral")
elif a == b or b == c or a == c:
    print("Isosceles")
else:
    print("Scalene")

def classify_triangle(side1, side2, side3):
    """
    Classifies a triangle as equilateral, isosceles, or scalene based on its side lengths.

    Args:
        side1 (float): Length of the first side.
        side2 (float): Length of the second side.
        side3 (float): Length of the third side.

    Returns:
        str: The type of the triangle ("Equilateral", "Isosceles", or "Scalene").
    """
    if side1 == side2 and side2 == side3:
        return "Equilateral"
    elif side1 == side2 or side2 == side3 or side1 == side3:
        return "Isosceles"
    else:
        return "Scalene"

# Input from the user
try:
    s1 = float(input("Enter the length of the first side: "))
    s2 = float(input("Enter the length of the second side: "))
    s3 = float(input("Enter the length of the third side: "))

    # Check for valid triangle (triangle inequality theorem)
    if (s1 + s2 > s3) and (s1 + s3 > s2) and (s2 + s3 > s1):
        triangle_type = classify_triangle(s1, s2, s3)
        print(f"The triangle is: {triangle_type}")
    else:
        print("The entered side lengths do not form a valid triangle.")
except ValueError:
    print("Invalid input. Please enter numeric values for side lengths.")