Problem:
Score : 100 points

Problem Statement

CODE FESTIVAL 2016 is going to be held. For the occasion, Mr. Takahashi decided to make a signboard.

He intended to write CODEFESTIVAL2016 on it, but he mistakenly wrote a different string S. Fortunately, the string he wrote was the correct length.

So Mr. Takahashi decided to perform an operation that replaces a certain character with another in the minimum number of iterations, changing the string to CODEFESTIVAL2016.

Find the minimum number of iterations for the rewrite operation.

Constraints

S is 16 characters long.

S consists of uppercase and lowercase alphabet letters and numerals.

Input

Inputs are provided from Standard Input in the following form.

S

Output

Output an integer representing the minimum number of iterations needed for the rewrite operation.

Sample Input 1

C0DEFESTIVAL2O16

Sample Output 1

2

The second character 0 must be changed to O and the 14th character O changed to 0.

Sample Input 2

FESTIVAL2016CODE

Sample Output 2

16

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

import java.util.Scanner;
import java.io.IOException;

public class Main {
    public static void main(String[] args) throws IOException {
        Scanner dis = new Scanner(System.in);
        int n = dis.nextInt(), a = dis.nextInt(), b = dis.nextInt();
        String s = dis.next();
        for (int i = 0; i < n; i++) {
            char c = s.charAt(i);
            if (c == 'a') {
                a--;
                if (a + b >= 0) System.out.println("Yes");
                else System.out.println("No");
            } else if (c == 'b') {
                b--;
                if (a + b >= 0 && b >= 0) System.out.println("Yes");
                else System.out.println("No");
            } else System.out.println("No");
        }
    }
}