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: Wrong Answer)

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

int main(){
	long int N,A,B,i;
	long int japan=0, over=0;
	char input[1024];
	scanf("%ld%ld%ld",&N,&A,&B);
	scanf("%s",input);
	for(i=0;i<N;i++){
		if(input[i]=='a'){
			if(japan+over==A+B) printf("No\n");
			else{
				printf("Yes\n");japan++;
			}
		}else if(input[i]=='b'){
			if(japan+over==A+B) printf("No\n");
			else if(over==B){
				printf("No\n");
			}else{
				printf("Yes\n");
				over++;
			}
		}else{
			printf("No\n");
		}
	}
	return 0;
}