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)

int main()
{
	char string[16];
	scanf("%s",string);
	int i;
	if (string[0] != 'C') i++;
	if (string[1] != 'O') i++;
	if (string[2] != 'D') i++;	
	if (string[3] != 'E') i++;
	if (string[4] != 'F') i++;
	if (string[5] != 'E') i++;
	if (string[6] != 'S') i++;
	if (string[7] != 'T') i++;
	if (string[8] != 'I') i++;
	if (string[9] != 'V') i++;
	if (string[10] != 'A') i++;
	if (string[11] != 'L') i++;
	if (string[12] != '2') i++;
	if (string[13] != '0') i++;
	if (string[14] != '1') i++;
	if (string[15] != '6') i++;

	printf("%d\n",i);
	return 0;
}