p01898 Taking a Seat
A: Taking a Seat-Taking a Seat-

story

Mr. A entered the classroom at the examination site to take an examination. However, Mr. A is a very nervous type. Therefore, depending on the situation, there may be seats that Mr. A does not want to sit in. Therefore, Mr. A decided to find out how many seats he could sit on based on certain conditions.

problem

Mr. A is a nervous type of person. First of all, Mr. A cannot sit in the first row from the front. Because when I sit near the proctor, I get nervous and can't solve the problem. Also, if there is a person on the right or left, Mr. A cannot sit down. This is because the sound of the pencil next to me makes it impossible to concentrate during the test. In addition, you can't sit near a noisy guy (near 8 diagonally up, down, left, and right). This is because my voice echoes in my head during the break and I can't rest. Also, it's natural, but I can't sit in the seat where the students are already sitting.

Is there a place where Mr. A can sit under these conditions? Assuming that M x N seats are lined up in the classroom, let's find the number.

Input format

The first row gives M (number of rows: number of vertical seats) and N (number of columns: number of horizontal seats). From the second line, M lines and a character string of length N are given line by line. The j character of the i-th character string represents the state of the seat in the i-th row and the j-th column. Each letter is either'-',' x'or'o', vacant seats'-', noisy students sitting during breaks'x', other students sitting' Let it be o'.

Constraint

* 0 <M ≤ 100
* 0 <N ≤ 100



Output format

Output the number of seats that Mr. A can sit in one line depending on the conditions. Don't forget the line break at the end.

Input example 1


5 5
--o--
--xo-
--x--
o --- x
--xoo


Output example 1


3

Input example 2


2 6
--oooo
x--o--


Output example 2


1

Input example 3


3 5
-----
-----
-----


Output example 3


Ten

Input example 4


4 6
o-oxoo
oo-ooo
oooxo-
o-ooox


Output example 4


0





Example

Input

5 5
--o--
--xo-
--x--
o---x
--xoo


Output

3
```python

m,n = map(int,input().split())
seat = [list(input()) for i in range(m)]
dummy = ["0" for i in range(n+2)]
for i in range(m):
    seat[i].insert(0,"0")
    seat[i].append("0")
seat.insert(0,dummy)
seat.append(dummy)

for i in range(1,m + 1):
    for j in range(1,n + 1):
        if seat[i][j] == "o":
            if seat[i][j - 1] == "-":
                seat[i][j - 1] = "0"
            if seat[i][j + 1] == "-":
                seat[i][j + 1] = "0"
        elif seat[i][j] == "x":
            for k in range(3):
                for l in range(3):
                    if seat[i - 1 + k][j - 1 + l] == "-":
                        seat[i - 1 + k][j - 1 + l] = "0"

for i in range(n + 1):
    if seat[1][i] == "-":
        seat[1][i] = "0"

count = 0
for i in seat:
    for j in i:
        if j == "-":
            count += 1

print (count)
```