numbers = [10, 20, 30, 40]

print("Original list:", numbers)

numbers.append(50)
print("After append:", numbers)

numbers.insert(2, 25)   
print("After insert:", numbers)

numbers.remove(30)     
print("After remove:", numbers)

print("Length of list:", len(numbers))


numbers.pop()          
print("After pop:", numbers)

numbers.clear()
print("After clear:", numbers)
