HIIT Generation

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;

public class H {
	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String cur = "HIIT";
		String s = "HIIT";
		for (int i = 0; i < n; i++) {
			String m = br.readLine();
			if (m.equals("I")) {
				cur = cur.replaceAll("II", "HIITHIIT");
			} else {
				cur = cur.replaceAll(m,  s);
			}
		}
	}
}

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: TIME LIMIT EXCEEDED

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER