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 Python (3.8.2) (judge verdict: Accepted)

# 1.　s1,s2,s3を入力する
s1, s2, s3 = map(str,input().split())

# 2.　s1,s2,s3の先頭文字を取り出して、一つのリストに格納する
s_list = [s1[0], s2[0], s3[0]]

# 3.　2を結合し、大文字にする
s = "".join(s_list)
ss = s.upper()

# 4.　3を大文字にする
print(ss)