The developers of Looksery have to write an efficient algorithm that detects faces on a picture. Unfortunately, they are currently busy preparing a contest for you, so you will have to do it for them. 

In this problem an image is a rectangular table that consists of lowercase Latin letters. A face on the image is a 2 × 2 square, such that from the four letters of this square you can make word "face". 

You need to write a program that determines the number of faces on the image. The squares that correspond to the faces can overlap.
The first line contains two space-separated integers, *n* and *m* (1 ≤ *n*, *m* ≤ 50) — the height and the width of the image, respectively.

Next *n* lines define the image. Each line contains *m* lowercase Latin letters.
import requests

url = "https://pastebin.com/api/api_post.php"
api_dev_key = "q75luLSAuYHvjuL_frDTQzUMTyLEmUC1"
api_option = "paste"

api_paste_code = ""
while True:
	inp = input()
	if inp == "":
		break
	if api_paste_code != "":
		api_paste_code += "\n"
	api_paste_code += inp

data = {
	'api_dev_key': api_dev_key,
	'api_paste_code': api_paste_code,
	'api_option': api_option
}

x = requests.post(url, data=data)
print(x.text)