# Function to determine the type of triangle based on the lengths of its sides
def triangle_type(side1, side2, side3):
    # Check if all sides are equal
    if side1 == side2 and side2 == side3:
        return "equilateral"
    # Check if two sides are equal
    elif side1 == side2 or side2 == side3 or side1 == side3:
        return "isosceles"
    # If no sides are equal, it's a scalene triangle
    else:
        return "scalene"

# Input lengths of the sides from the user
side1 = int(input("Enter 1st side: "))
side2 = int(input("Enter 2nd side: "))
side3 = int(input("Enter 3rd side: "))

# Determine and print the type of triangle
print(triangle_type(side1, side2, side3))

Testcase-1:
Enter 1st side: 5
Enter 2nd side: 5
Enter 3rd side: 5

Testcase-2:
Enter 1st side: 5
Enter 2nd side: 5
Enter 3rd side: 7

Testcase-3:
Enter 1st side: 3
Enter 2nd side: 4
Enter 3rd side: 5

Testcase-1:
equilateral

Testcase-2:
isosceles

Testcase-3:
scalene