import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		String s1 = sc.next();
		String s2 = sc.next();
		String s3 = sc.next();
		sc.close();

		StringBuilder sb = new StringBuilder();
		sb.append(Character.toUpperCase(s1.charAt(0)));
		sb.append(Character.toUpperCase(s2.charAt(0)));
		sb.append(Character.toUpperCase(s3.charAt(0)));
		System.out.println(sb.toString());
	}
}