X Pattern

 Write a program to take String if the length of String is odd print X pattern otherwise print INVALID.

Input Format:
Take a String as input from stdin.

Output Format:
print the desired Pattern or INVALID.

Example Input:
edyst

Output:


e   t
 d s 
  y  
 d s 
e   t







SOLUTION:


s=input()
l=len(s)
if(l%2 != 0):
    for i in range(0,l):
        j=l-i-1
        for k in range(0,l):
            if(k==i or k==j):
                print(s[k],end="")
            else:
                print(end=" ")
        print("")
else:
    print("INVALID")

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