Problem Statement

The postal code in Atcoder Kingdom is $A+B+1$ characters long, its $(A+1)$-th character is a hyphen -, and the other characters are digits from 0 through 9.

You are given a string $S$. Determine whether it follows the postal code format in Atcoder Kingdom.

Constraints

• $1≤A,B≤5$
• $|S|=A+B+1$
• $S$ consists of - and digits from 0 through 9.

Input

Input is given from Standard Input in the following format:

A B
S

Output

Print Yes if $S$ follows the postal code format in AtCoder Kingdom; print No otherwise.