# Amazon Online Assessment 2021 (OA) - Simple Cipher

As part of a Day 1 Challenge, your new team at Amazon has created a basic alphabet-based encryption and has asked members to test the cipher. A simple cipher is built on the alphabet wheel which has uppercase english letters['A'-'Z'] written on it:

Given an encrypted string consisting of english letters['A'-'Z'] only, decrypt the string by replacing each character with the kth character away on the wheel in counter clockwise direction. Counter-clockwise is the opposite direction is which the hands on a clock usually move.

Relevant Amazon OA Problems:

### Input

• `encryped`: a string
• `k`: an integer

### Output

the decrypted string

### Examples

#### Example 1:

Input:

``````1encryped = VTAOG
2k = 2``````

Output: `TRYME`

Explanation:

Looking back 2 from 'V' returns 'T', from 'T' returns 'R' and so on. The decrypted string is 'TRYME'.

## Title

### Script

Lorem Ipsum is simply dummy text of the printing and typesetting industry. `Lorem` `Ipsum` has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.

Contrary to popular belief, `Lorem` `Ipsum` is not simply random text.

``````1  >>> a = [1, 2, 3]
2  >>> a[-1]
3  3``````