#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main ()

{
	const int Nmax = 8, Mmax = 8;
	int  S[Nmax][Mmax], spots = 0;
	int x = 0, y = 0;
	char ch;
	freopen ("chess.in", "r", stdin);
	freopen ("chess.out", "w", stdout);
	for (int i = 0; i < 8; i++)
	{
		for (int k = 0; k < 8; k++)
		{
			scanf ("%c", &ch);
			if (ch == 'R')
				S[i][k] = 3;
			else
				if (ch == 'B')
					S[i][k] = 2;
				else
					S[i][k] = 0;
		}
		scanf ("\n");
	}
	for (int i = 0; i <= 8; i++)
		for (int k = 0; k <= 8; k++)
		{
			if (S[i][k] == 3)
			{
				x = i;
				y = k;
				while (--y >= 0)
					if (S[x][y] == 0 || S[x][y] == 1)
						S[x][y] = 1;
					else
						break;
				y = k;
				while (++y <= 7)
					if (S[x][y] == 0 || S[x][y] == 1)
						S[x][y] = 1;
					else
						break;
				y = k;
				while (--x >= 0)
					if (S[x][y] == 0 || S[x][y] == 1)
						S[x][y] = 1;
					else
						break;
				x = i;
				while (++x <= 7)
					if (S[x][y] == 0 || S[x][y] == 1)
						S[x][y] = 1;
					else
						break;
		}
			else
				if (S[i][k] == 2)
				{
					x = i;
					y = k;
					while (--y >= 0 && --x >= 0)
						if (S[x][y] == 0 || S[x][y] == 1)
							S[x][y] = 1;
					else
						break;
					x = i;
					y = k;
					while (--y >= 0 && ++x <= 7)
						if (S[x][y] == 0 || S[x][y] == 1)
							S[x][y] = 1;
					else
						break;
					x = i;
					y = k;
					while (++y <= 7 && ++x <= 7)
						if (S[x][y] == 0 || S[x][y] == 1)
							S[x][y] = 1;
					else
						break;
					x = i;
					y = k;
					while (++y <= 7 && --x >= 0)
						if (S[x][y] == 0 || S[x][y] == 1)
							S[x][y] = 1;
					else
						break;
				}
		}
	for (int i = 0; i < 8; i++)
		for (int k = 0; k < 8; k++)
			if (S[i][k] == 0)
				spots++;
	printf ("%d", spots);
	return 0;
}