Reverse Alphabet Triangle Pattern

The program must accept an integer N as the input. The program must print the desired pattern as shown in the Example Input/Output section.

Boundary Condition(s):
2 <= N <= 26

Example Input/Output 1:
Input:
5

Output:
—-a
—ba
–cba
-dcba
edcba

Example Input/Output 2:
Input:
4

Output:
—a
–ba
-cba
dcba

N = int(input())
alpha = ord('a')
for row in range(1, N+1):
    print('-'*(N-row), end = "")
    for col in range(1, row+1):
        print(chr(alpha), end = "")
        alpha = alpha-1
    alpha = alpha+(row+1)
    print()