p03970 CODE FESTIVAL 2016 qual B - Signboard
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.

Examples

Input

C0DEFESTIVAL2O16


Output

2


Input

FESTIVAL2016CODE


Output

16
```python
s = input()
t = 'CODEFESTIVAL2016'
ans = 0
for i, j in zip(s, t):
    if i != j:
        ans += 1
print(ans)

```