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: Accepted)

//semicolon less Java with Stream API
import java.util.stream.*;
import java.util.*;
class Main{
    public static void main(String[] args){
        if(Stream.<String[]>of(new String[]{
            new java.util.Scanner(System.in).next(),
            "CODEFESTIVAL2016"})
            .peek(str -> System.out.println(
                IntStream.range(0, 16)
                .filter(i -> str[0].charAt(i) != str[1].charAt(i))
                .count())
        ).count() > 0){}
    }
}