package main

import . "fmt"

func main() {
	var h,w int
	Scan(&h,&w)
	f:=make([][]byte,h)
	for i:=range f {
		var s string
		Scan(&s)
		f[i]=[]byte(s)
	}
	ps:=[]int{0,0,1}
	var ans int
	for len(ps)>0 {
		n:=len(ps)-3
		x,y,c:=ps[n],ps[n+1],ps[n+2]
		ps=ps[:n]
		if x+1<w{
			if e:=f[y][x+1];e=='o' {
				ps=append(ps,x+1,y,c+1)
			} else if e=='x'&&c>0 {
				ps=append(ps,x+1,y,c-1)
			}
		}
		if y+1<h {
			if e:=f[y+1][x];e=='o' {
				ps=append(ps,x,y+1,c+1)
			} else if e=='x'&&c>0 {
				ps=append(ps,x,y+1,c-1)
			}
		}
		if x+1==w&&y+1==h {
			ans++
		}
	}
	Println(ans)
}