Alphabet Rangoli hackerrank

 def print_rangoli(size):

    # your code goes here
    n=size
    l1 =list(map(chr,range(97,123)))
    x=l1[n-1::-1]+l1[1:n]
    m=len('-'.join(x))
    for i in range(1,n):
        print('-'.join(l1[n-1:n-i:-1]+l1[n-i:n]).center(m,'-'))
    for i in range(n,0,-1):
        print('-'.join(l1[n-1:n-i:-1]+l1[n-i:n]).center(m,'-'))
if __name__ == '__main__':
    n = int(input())
    print_rangoli(n)

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