mat =[list(input()) for _ in range(8)]
for i in range(8):
    for j in range(8):
        if mat[i][j] == 'R' or mat[i][j] == 'B':
            x0 = i
            y0 = j
            for x in range(8):
                for y in range(8):
                    if abs(x - x0) == abs(y - y0) and mat[i][j] == 'B' and mat[x][y] != 'R' and mat[x][y] != 'B' and mat[x][y] != '.':
                        mat[x][y] = '.'
                    if (x == x0 or y == y0) and mat[i][j] == 'R' and mat[x][y] != 'R' and mat[x][y] != 'B' and mat[x][y] != '.':
                        mat[x][y] = '.'
k = 0
for i in range(8):
    for j in range(8):
#        print(mat[i][j], end=' ')
        if mat[i][j] == '*':
            k += 1
#    print()
print(k)