Problem:
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 and T.

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

Solution in Java7 (OpenJDK 1.7.0) (judge verdict: Wrong Answer)

public class Main{
public static void main(String args[]){
String name;
  name="A";
  name="T";
  name="C";
  name="G";
  if(name.equals("A")){
  System.out.println("T");}
if(name.equals("C")){
  System.out.println("G");}
}
}