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<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int c,sum;
char b[10000],a[10000];
int main(){
	a[0]='C';
	a[1]='O';
	a[2]='D';
	a[3]='E';
	a[4]='F';
	a[5]='E';
	a[6]='S';
	a[7]='T';
	a[8]='I';
	a[9]='V';
	a[10]='A';
	a[11]='L';
	a[12]='2';
	a[13]='0';
	a[14]='1';
	a[15]='6';
	cin>>b;
	for(int i=0;i<16;i++){
		if(a[i]!=b[i]){
			sum++;
		}
	}
	cout<<sum;
	return 0;
}