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# Caesar Cipher CodeChef Problem Solution 2023 | Problem Code: CAESAR

## Problem

In the ROT-K cipher, each character in the string is shifted a fixed number of positions down the alphabet. The value of K represents the number of positions to shift. For instance, in ROT-2, each character is shifted $2$ positions. The ROT-2 cipher of the string code is eqfg.

Note that the rotation is performed in a circular manner, meaning that if the character z is shifted by one position, we obtain the character a.

You are given strings $�,�,$ and $�$, each of length $�$, such that the ROT-K cipher of string $�$ is string $�$.
Find the ROT-K cipher of string $�$.

### Input Format

• The first line of input will contain a single integer $�$, denoting the number of queries.
• Each query consists of multiple lines of input.
• The first line of each query contains $�$ — the length of the strings.
• The second line contains the string $�$.
• The third line contains the string $�$.
• The fourth line contains the string $�$.

### Output Format

For each query, output on a new line, the ROT-K cipher of string $�$.

### Constraints

• $1\le �\le 100$
• $1\le �\le 1000$
• $�,�,$ and $�$ contain lowercase english alphabets only.