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 Go (1.6) (judge verdict: Wrong Answer)

package main
 
import ("fmt")
 
func main(){
	var N, K, M, add, ave int
	var A [100]int
	
	fmt.Scan(&N, &K, &M)
	for i := 0 ; i < N - 1 ; i++ {
		fmt.Scan(&A[i])
	}
	add = 0
	for i := 0 ; i < N - 1 ; i++{
		add += A[i]
	}
//	fmt.Println(add)
	ave = N * M - add
	if ave > K {
		ave = -1
	}else if ave < 0{
		ave = 0
	}
	fmt.Println(ave);	
}