import java.util.*;

public class Main {
    public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String ans = "";
		for(int i = 0 ; i < 3 ; i++){
			String str = scan.next();
			ans = ans + Character.toUpperCase(str.charAt(0));
		}
		System.out.println(ans);
    }
}