package main

import . "fmt"
import . "strings"

func main() {
	var n int
	Scan(&n)
	col:=make([]int,n)
	var ans,x,y int
	for i:=range col {
		var s string
		Scan(&s)
		if Count(s,"B")==0&&Count(s,".")==1 {
			ans++
		}
		for k,r:=range s {
			e:=int(r)*int(r)*int(r)
			col[k]+=e
			if k==i {
				x+=e
			}
			if k==n-1-i {
				y+=e
			}
		}
	}
	q:=int('A')*int('A')*int('A')*(n-1)+
	    int('.')*int('.')*int('.')
	if x==q {
		ans++
	}
	if y==q {
		ans++
	}
	for _,c:=range col {
		if c==q {
			ans++
		}
	}
	Println(ans)
}