Problem Statement

You are given a string S, which represents a weather forecast for the seven days starting tomorrow.
The i-th of those seven days is forecast to be sunny if the i-th character of S is o, and rainy if that character is x.
Tell us whether the N-th day is forecast to be sunny.

Input

Input is given from Standard Input in the following format:
N
S

Output

Print Yes if the N-th of the seven days starting tomorrow is forecast to be sunny, and No if that day is forecast to be rainy.

Constraints

• N is an integer between 1 and 7 (inclusive).
• S is a string of length 7 consisting of o and x.

Sample Input 1

4
oooxoox

Sample Output 1

No

The forecast for each of the seven days starting tomorrow is as follows: sunny, sunny, sunny, rainy, sunny, sunny, rainy.
In particular, the fourth day is forecast to be rainy.

Sample Input 2

7
ooooooo

Sample Output 2

Yes

见题面 Input 部分

见题面 Output 部分