Problem:
Score : 100 points

Problem Statement

You are given three words s_1, s_2 and s_3, each composed of lowercase English letters, with spaces in between.
Print the acronym formed from the uppercased initial letters of the words.

Constraints

s_1, s_2 and s_3 are composed of lowercase English letters.

1 ≤ |s_i| ≤ 10 (1≤i≤3)

Input

Input is given from Standard Input in the following format:

s_1 s_2 s_3

Output

Print the answer.

Sample Input 1

atcoder beginner contest

Sample Output 1

ABC

The initial letters of atcoder, beginner and contest are a, b and c. Uppercase and concatenate them to obtain ABC.

Sample Input 2

resident register number

Sample Output 2

RRN

Sample Input 3

k nearest neighbor

Sample Output 3

KNN

Sample Input 4

async layered coding

Sample Output 4

ALC

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

class Test01
{
    public static void Main()
    {
        string str;
        int t;
        //string test;
        char i1; //先頭の文字
        char i2; //半角スペースの1文字後ろの文字
        char i3; //文字列の末尾から最初の半角スペースの後ろの文字

        t = 0;

        str = Console.ReadLine();

        i1 = str[0];
        t = str.IndexOf(' ');
        t = t + 1;
        i2 = str[t];
        t = str.LastIndexOf(' ');
        t = t + 1;
        i3 = str[t];

        i1 = Char.ToUpper(i1);
        i2 = Char.ToUpper(i2);
        i3 = Char.ToUpper(i3);

        String a = i1.ToString();
        String b = i2.ToString();
        String c = i3.ToString();


        Console.WriteLine(a + b + c);
        //test = Console.ReadLine();
    }
}