Taco Decoder: Reverse Character Rotation

You are given an integer N and an encoded string E. The encoded string is produced by rotating each alphabetical character forward by N positions in the alphabet. Your task is to decode the string by rotating each character backward by N positions.

For each character c in the string:

$$decoded\_char = \text{chr}(((\text{ord}(c) - \text{ord}(base) - N) \mod 26) + \text{ord}(base))$$

where base is 'A' for uppercase letters and 'a' for lowercase letters.

The decoded string should maintain the case of every letter.

inputFormat

The input consists of two lines:

• The first line contains an integer N.
• The second line contains the encoded string E, which consists of only uppercase and lowercase English letters.

outputFormat

Output a single line containing the decoded string.

3
KhoorZruog

HelloWorld