18388번 - SECHT 다국어

Miraqa and Sorya wanted to have a secret chat. To this aim, they used a simple rule as follows: “Use the upper case of the left of the correct key if it is a letter otherwise use the lower case of the correct key”

Write a program for decoding an encoded text. The encoded text is formed base on mentioned rule.

Input contains one line. Which may contain both upper and lower case letters.

입력으로 주어지는 문자열의 길이는 50보다 작거나 같은 자연수이다.

Print the decoded text. Note that you should echo the spaces directly to output.