HIIT Generation

package h;

import java.util.Scanner;

public class h {

	public static void main(String[] args) {
		String s = "HIIT", f = "HIIT", x;
		Scanner in = new Scanner(System.in);
		int n = Integer.parseInt(in.nextLine());
		for (int i = 0; i < n; i++) {
			x = in.nextLine();
			f = f.replace(x,  s);
		}
		System.out.println(f);
	}
	
}

Test 1

Verdict: RUNTIME ERROR

Error: Could not find or load main class h
Caused by: java.lang.ClassNotFoundException: h

Test 2

Verdict: RUNTIME ERROR

Error: Could not find or load main class h
Caused by: java.lang.ClassNotFoundException: h

Test 3

Verdict: RUNTIME ERROR

Error: Could not find or load main class h
Caused by: java.lang.ClassNotFoundException: h

Test 4

Verdict: RUNTIME ERROR

Error: Could not find or load main class h
Caused by: java.lang.ClassNotFoundException: h