Write a program which reads an integer h from the user and prints a 'Z' with height h by using the upper-case ‘X’ and ‘_’ (i.e., underscore) characters.
The lines of your Z will compose of the character X and the spaces between the lines will be represented by the _ character.

If you look at the first example, you can observe followings: Examples:
INPUT OUTPUT
6 6
9 9


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