Problem:
Score : 100 points

Problem Statement

Given is a lowercase English letter C that is not z. Print the letter that follows C in alphabetical order.

Constraints

C is a lowercase English letter that is not z.

Input

Input is given from Standard Input in the following format:

C

Output

Print the letter that follows C in alphabetical order.

Sample Input 1

a

Sample Output 1

b

a is followed by b.

Sample Input 2

y

Sample Output 2

z

y is followed by z.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.Scanner;
 
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
 
    
    int a = sc.nextInt();
    
    int b = sc.nextInt();
    
    int c = sc.nextInt();
 
    int previousResultSum = 0;
    for (int i = 0; i < a - 1; i++) {
      previousResultSum += sc.nextInt();
    }
 
    int result = -1;
    for (int i = 0; i <= b; i++) {
      if ((previousResultSum + i) / a >= c) {
        result = i;
        break;
      }
    }
    System.out.println(result);
  }
}