#include <iostream>
#include <vector>

using namespace std;

int main() {
    int arr[8][8];
    int b = 0;
    int c=0;
    vector<string>chess(8);
    int cnt=0;
    for (int i = 0;i < 8 ;i++ ) {
        cin >> chess[i];
        if (i % 2 == 0) {
            arr[i][0] = 1;
            arr[i][1] = 0;
            arr[i][2] = 1;
            arr[i][3] = 0;
            arr[i][4] = 1;
            arr[i][5] = 0;
            arr[i][6] = 1;
            arr[i][7] = 0;
        }
        else{
            arr[i][0] = 0;
            arr[i][1] = 1;
            arr[i][2] = 0;
            arr[i][3] = 1;
            arr[i][4] = 0;
            arr[i][5] = 1;
            arr[i][6] = 0;
            arr[i][7] = 1;
        }
    }
    for (int i = 0;i < 8 ;i++ ) {
        for (int j = 0;j < 8 ;j++ ) {
            if (arr[i][j] == 1) {
                if (chess[i][j] == 'F') {
                    cnt++;
                }
            }
        }
    }
    cout << cnt;
    return 0;
}