using System.Numerics;

public class Program
{
    public static void Main()
    {

        //BigInteger num = BigInteger.Parse(Console.ReadLine() ?? string.Empty);
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;
        
        string a = str[0];
        string b = str[1];
        string c = str[2];

        char aa = Char.ToUpper(a[0]);
        char bb = Char.ToUpper(b[0]);
        char cc = Char.ToUpper(c[0]);

        Console.WriteLine("{0}{1}{2}",aa,bb,cc);


    }

}