using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var s = ReadLine().Split();
        WriteLine($"{(char)(s[0][0] + 'A' - 'a')}{(char)(s[1][0] + 'A' - 'a')}{(char)(s[2][0] + 'A' - 'a')}");
    }
}