p03957 CODE FESTIVAL 2016 qual C - CF
This contest is `CODEFESTIVAL`, which can be shortened to the string `CF` by deleting some characters.

Mr. Takahashi, full of curiosity, wondered if he could obtain `CF` from other strings in the same way.

You are given a string s consisting of uppercase English letters. Determine whether the string `CF` can be obtained from the string s by deleting some characters.

Constraints

* 2 ≤ |s| ≤ 100
* All characters in s are uppercase English letters (`A`-`Z`).

Input

The input is given from Standard Input in the following format:


s


Output

Print `Yes` if the string `CF` can be obtained from the string s by deleting some characters. Otherwise print `No`.

Examples

Input

CODEFESTIVAL


Output

Yes


Input

FESTIVALCODE


Output

No


Input

CF


Output

Yes


Input

FCF


Output

Yes
```python
import re
print("YNeos"[re.match(".*C.*F.*",input())==None::2])

```