Horizontal lines P74306

Statement

Your task is to write a program that computes the number of horizontal lines contained in a given rectangle of characters. We consider that an horizontal line is a sequence of two or more dashes consecutive horizontally.

Input

The input starts with two naturals $n \ge 1$ and $m \ge 1$ , followed by $n$ lines, each one with $m$ characters. All the characters are dashes and lowercase letters.

Output

Your program must print the number of horizontal lines contained in the given rectangle.

Public test cases

Input

4 10
bb--cd----
a--f--d--d
abcdefghij
---z------

Output

Input

3 3
-a-
a-a
-a-

Output

Input

1 2
--

Output

Input

5 1
-
a
-
b
-

Output

Information

Author: Salvador Roura
Language: English
Translator: Carlos Molina
Original language: Spanish
Other languages: Spanish
Official solutions: C++
User solutions: C++