Problem:
Score : 200 points

Problem Statement

In Japan, people make offerings called hina arare, colorful crackers, on March 3.

We have a bag that contains N hina arare. (From here, we call them arare.)

It is known that the bag either contains arare in three colors: pink, white and green, or contains arare in four colors: pink, white, green and yellow.

We have taken out the arare in the bag one by one, and the color of the i-th arare was S_i, where colors are represented as follows - pink: P, white: W, green: G, yellow: Y.

If the number of colors of the arare in the bag was three, print Three; if the number of colors was four, print Four.

Constraints

1 \leq N \leq 100

S_i is P, W, G or Y.

There always exist i, j and k such that S_i=P, S_j=W and S_k=G.

Input

Input is given from Standard Input in the following format:

N
S_1 S_2 ... S_N

Output

If the number of colors of the arare in the bag was three, print Three; if the number of colors was four, print Four.

Sample Input 1

6
G W Y P Y W

Sample Output 1

Four

The bag contained arare in four colors, so you should print Four.

Sample Input 2

9
G W W G P W P G G

Sample Output 2

Three

The bag contained arare in three colors, so you should print Three.

Sample Input 3

8
P Y W G Y W Y Y

Sample Output 3

Four

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.Scanner;


public class Main {
	
	static int[][] memory;
	
    public static void main(String[] args) {
        // 自分の得意な言語で
        // Let's チャレンジ！！

        Scanner sc = new Scanner(System.in);
        
        int N = sc.nextInt();
   
        int count = 0;
        boolean[] color = {false,false,false,false};
        
        for(int i = 0;i<N;i++){
        	
        	String line = sc.next();
        	
        	if('P'==line.charAt(0)&&!color[0]){
        		color[0] = true;
        		count++;
        	}else if('W'==line.charAt(0)&&!color[1]){
        		color[1] = true;
        		count++;
        	}else if('G'==line.charAt(0)&&!color[2]){
        		color[2] = true;
        		count++;
        	}else if('Y'==line.charAt(0)&&!color[3]){
        		color[3] = true;
        		count++;
        	}
        	
        	if(count==4) break;
        	
        }
        
        System.out.println(count);
		
	}
		

    
}