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: Accepted)

# N = gets.chomp.to_i
# A, B, C = gets.chomp.split.map(&:to_i)
S = gets.chomp

if S[0] >= 'a' && S[0] <= 'z'
  print "a\n"
else
  print "A\n"
end