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 Java7 (OpenJDK 1.7.0) (judge verdict: Accepted)

import java.util.Scanner;

public class Main {
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
       		String[] strStdIn = new String[1];
		int m = 0;
		while (m != 1) {
			strStdIn[m] = scanner.nextLine();
			m++;
		}

		String target = strStdIn[0];

		String rightString = "CODEFESTIVAL2016";
		int count = 0;

		for (int i=0; i < rightString.length(); i++) {
			if (!target.substring(i, i+1).equals(rightString.substring(i, i+1))) {
				count++;
			}
			if (i + 1 == rightString.length()) {
				break;
			}
		}
		
		System.out.println(count);
    	}
}