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 C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>

#define max(a, b) a<b?b:a
#define min(a, b) a>b?b:a
#define INF 1010001000

int n;
int bef[100001], aft[100001];
char s[100001];

int main(void)
{
    int i, j, a, b;
    int max, min, sum = 0;
    char cod[100] = "CODEFESTIVAL2016";
    
    scanf("%s", s);

    for (i = 0; s[i] != '\0'; i++) {
        if (cod[i] != s[i]) {
            sum++;
        }
    }

    printf("%d\n",sum);




    return 0;
}