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<bits/stdc++.h>//万能文件头
using namespace std;
string s="CODEFESTIVAL2016";//好像也没什么用
string a;
long long ans;
int main(){
    cin>>a;//输入字符串
    if(a[0] != 'C') ans++;//开始无脑判断
    if(a[1] != 'O') ans++;//要是有一个不一样
    if(a[2] != 'D') ans++;//就马上加上去
    if(a[3] != 'E') ans++;
    if(a[4] != 'F') ans++;
    if(a[5] != 'E') ans++;
    if(a[6] != 'S') ans++;
    if(a[7] != 'T') ans++;
    if(a[8] != 'I') ans++;
    if(a[9] != 'V') ans++;
    if(a[10] != 'A') ans++;
    if(a[11] != 'L') ans++;
    if(a[12] != '2') ans++;
    if(a[13] != '0') ans++;
    if(a[14] != '1') ans++;
    if(a[15] != '6') ans++;
    cout<<ans<<endl;//加完了，输出
}