Horizontal lines

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.

Problem information

Author: Unknown
Translator: Carlos Molina

Generation: 2026-01-25T11:46:42.481Z