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 Python (3.8.2) (judge verdict: Runtime Error)

literal = ('a', 'b', 'c', 'd', 'e', 'f', 
           'g', 'h', 'i', 'j', 'k', 'l', 
           'm', 'n', 'o', 'p', 'q', 'r', 
           's', 't', 'u', 'v', 'w', 'x', 
           'y', 'z')
x = int(input())
str2 = ''
str3 = ''
q = x
if x < 27:
    str3 = literal[x-1]
while q > 26:
    q, mod = divmod(x, 26)
    str1 = ''
    if q > 26:
        x = q
        str1 = literal[mod - 1]
        str3 = str1 + str2
        str2 = str3
        str3 = ''
    else:
        str1 += literal[q - 1]
        str1 += literal[mod - 1]
        str3 = str1 + str2
print(str3)