import java.io.*;
import java.util.StringTokenizer;

public class Main{
    public static void main(String[] args) {
        String[] a = new String[3];
        for (int i = 0; i < 3; i++) {
            a[i] = sc.next();
        }
        for (int i = 0; i < 3; i++) {
            char c = a[i].charAt(0);
            out.print(Character.toUpperCase(c));
        }
        out.close();
    }

    static Kattio sc = new Kattio();
    static PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));

    static class Kattio {
        static BufferedReader r;
        static StringTokenizer st;

        public Kattio() {
            r = new BufferedReader(new InputStreamReader(System.in));
        }

        public String next() {
            try {
                while (st == null || !st.hasMoreTokens()) {
                    st = new StringTokenizer(r.readLine());
                }
                return st.nextToken();
            } catch (Exception e) {
                return null;
            }
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }
}