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 Ruby (2.3.3) (judge verdict: Runtime Error)

N = gets.to_i
ary = gets.split.map(&:to_i)
# 奇数番をマイナスにするケース
cnt1 = 0
sum = 0
ary.each_with_index do |n, i|
    diff = 0
    sum += n
    if i.odd?
        if sum >= 0
            diff = -sum - 1
        end
    else
        if sum <= 0
            diff = -sum + 1
        end
    end
    cnt1 += diff.abs
    sum += diff
end
# 偶数番をマイナスにするケース
cnt2 = 0
sum = 0
ary.each_with_index do |n, i|
    diff = 0
    sum += n
    if i.even?
        if sum >= 0
            diff = -sum - 1
        end
    else
        if sum <= 0
            diff = -sum + 1
        end
    end
    cnt2 += diff.abs
    sum += diff
end
# プラスとマイナスで操作数の小さいほうを採用
puts [cnt1, cnt2].min