101220: [AtCoder]ABC122 A - Double Helix
Memory Limit:256 MB
Time Limit:2 S
Judge Style:Text Compare
Creator:
Submit:0
Solved:0
Description
Score : $100$ points
Problem Statement
On the Planet AtCoder, there are four types of bases: A
, C
, G
and T
. A
bonds with T
, and C
bonds with G
.
You are given a letter $b$ as input, which is A
, C
, G
or T
. Write a program that prints the letter representing the base that bonds with the base $b$.
Constraints
- $b$ is one of the letters
A
,C
,G
andT
.
Input
Input is given from Standard Input in the following format:
$b$
Output
Print the letter representing the base that bonds with the base $b$.
Sample Input 1
A
Sample Output 1
T
Sample Input 2
G
Sample Output 2
C