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

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