During a clear night, one will inevitably see stars in the night sky. Your job today is to count the number of stars (*) from a rectangular portion of the night sky.

Input

The first line of input will be 2 integers, h and w, which is the height(h) and width(w) of the rectangular area of sky you will be counting stars from. You may assume their values are below 1000.

The following h lines will have w characters per line, either x (Clear Sky) or * (star).

Output

Output a single integer, representing the amount of stars (*) there are in the night sky.

Sample Input

5 5
x***x
xxx*x
x*xxx
xxx*x
*xxxx

Sample Output

7