Problem:
Score : 100 points

Problem Statement

An uppercase or lowercase English letter \alpha will be given as input.
If \alpha is uppercase, print A; if it is lowercase, print a.

Constraints

\alpha is an uppercase (A - Z) or lowercase (a - z) English letter.

Input

Input is given from Standard Input in the following format:

α

Output

If \alpha is uppercase, print A; if it is lowercase, print a.

Sample Input 1

B

Sample Output 1

A

B is uppercase, so we should print A.

Sample Input 2

a

Sample Output 2

a

a is lowercase, so we should print a.

Solution in Ruby (2.7.1) (judge verdict: Runtime Error)

N = gets.to_i
A = gets.chomp.split.map(&:to_i)
Q = gets.to_i
ary = Q.times.map{gets.split.map(&:to_i)}
h = Array.new(10**5, 0)
A.each do |e|
  h[e] += 1
end


ans = A.sum

(0..Q-1).each do |i|
  x = ary[i][0]
  y = ary[i][1]
  ans += h[x]*(y-x)
  puts ans
  h[y] += h[x]
  h[x] = 0
end