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 OCaml (4.10.0) (judge verdict: Runtime Error)

let () =
  let num = Array.make 100001 0 in
  let sum = ref 0 in
  let n = Scanf.scanf "%d\n" @@ fun n -> n in
  for i = 0 to n - 1 do
    Scanf.scanf "%d " @@ fun d ->
    num.(d) <- num.(d) + 1; sum := !sum + d
  done;
  Scanf.scanf "%d\n" @@ fun q ->
  for i = 0 to q - 1 do
    Scanf.scanf "%d %d\n" @@ fun b c ->
    sum := !sum + (c - b) * num.(b); num.(c) <- num.(c) + num.(b); num.(b) <- 0;
    Printf.printf "%d\n" !sum
  done;