Problem: A mouse encountered a nice big cake and decided to take a walk across it, eating the berries on top of the cake on its way. The cake is rectangular, neatly divided into squares; some of the squares have a berry in them, and some don't.

The mouse is in a bit of a hurry, though, so once she enters the cake from its northwest corner (the top left cell in the input data), she will only go east (right) or south (down), until she reaches the southeast corner (the bottom right cell). She will eat every berry in the squares she passes through, but not in the other squares.

The mouse tries to choose her path so as to maximize the number of berries consumed. However, her haste and hunger might be clouding her judgement, leading her to suboptimal decisions...

Input

The first line of input contains two integers H and W (1 ≤ H, W ≤ 5), separated by a space, — the height and the width of the cake.

The next H lines contain a string of W characters each, representing the squares of the cake in that row: '.' represents an empty square, and '*' represents a square with a berry.

Output

Output the number of berries the mouse will eat following her strategy.

Examples

Input


4 3
*..
.*.
..*
...


Output


3


Input


4 4
.*..
*...
...*
..*.


Output


2


Input


3 4
..**
*...
....


Output


1


Input


5 5
..*..
.....
**...
**...
**...


Output


1

Solution (in PYTHON3):

Solution:
import sys
from bisect import *
from collections import deque
#from functools import *
#from fractions import Fraction as f
from copy import *	
#from heapq import *
from math import *
from itertools import permutations as prm,product
#from random import *
def eprint(*args):
    print(*args, file=sys.stderr)
zz=1
 
sys.setrecursionlimit(10**5)
if zz:
	input=sys.stdin.readline
else:	
	sys.stdin=open('input.txt', 'r')
	sys.stdout=open('all.txt','w')
di=[[-1,0],[1,0],[0,1],[0,-1]]

def fori(n):
	return [fi() for i in range(n)]	
def inc(d,c,x=1):
	d[c]=d[c]+x if c in d else x
def ii():
	return input().rstrip()	
def li():
	return [int(xx) for xx in input().split()]
def fli():
	return [float(x) for x in input().split()]	
def dadd(d,p,val):
	if p in d:
		d[p].append(val)
	else:
		d[p]=[val]		
def gi():	
	return [xx for xx in input().split()]
def gtc(tc,ans):
	print("Case #"+str(tc)+":",ans)	
def cil(n,m):
	return n//m+int(n%m>0)	
def fi():
	return int(input())
def pro(a): 
	return reduce(lambda a,b:a*b,a)		
def swap(a,i,j): 
	a[i],a[j]=a[j],a[i]	
def bits(i,n):
	p=bin(i)[2:]
	return (n-len(p))*"0"+p	
def prec(a,pre):
	for i in a:
		pre.append(pre[-1]+i)
	pre.pop(0)	
def YN(flag):
	print("YES" if flag else "NO")	
def si():
	return list(input().rstrip())	
def mi():
	return 	map(int,input().split())			
def gh():
	sys.stdout.flush()
def isvalid(i,j,n,m):
	return 0<=i<n and 0<=j<m 
def bo(i):
	return ord(i)-ord('a')	
def graph(n,m):
	for i in range(m):
		x,y=mi()
		a[x].append(y)
		a[y].append(x)



t=1
INF=10**18
uu=t



while t>0:
	t-=1
	n,m=mi()
	a=[]
	for i in range(n):
		a.append(ii())
	c=int(a[0][0]=='*')
	i=j=0
	while [i,j]!=[n-1,m-1]:
			mini=10**18
			ind=[-1,-1]
			for k in range(i,n):
				for l in range(j,m):
					if a[k][l]=='*' and [k,l]!=[i,j]:
						cc=k-i+l-j
						if mini>cc:
							mini=cc
							ind=[k,l]
			if ind==[-1,-1]	:
				print(c)
				exit(0)
			c+=1
			i,j=ind
	print(c)