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 Go (1.14.1) (judge verdict: Accepted)

package main

import (
  "fmt"
  "strings"
)

func main() {
  var s string
  fmt.Scanf("%s", &s)
  
  ans := ""
  if s == strings.ToLower(s) {
    ans = "a"
  }
  if s == strings.ToUpper(s) {
    ans = "A"
  }
  
  fmt.Printf("%s\n", ans)
}