37. Generate the aplhabet pattern using nested loops.

Generate the aplhabet pattern using nested loops.

Input Description:
Input consists of a string S.where length of the string (S)

Where 2<=S<=20.

Output Description:
Print the alphabet pattern from the given input string S.

Sample Input :
abcdef
Sample Output :
abcdef
b    e
c    d
d    c
e    b
fedcba



def pattern(s):
    n = len(s)
    print(s)
    for i in range(1, n-1):
        res = s[i]
        res += ' '*(n-2)
        res += s[n-i-1]
        print(res)
    print(s[::-1])
    
s = input()
pattern(s)