#include <iostream>
#include <string>

bool is_xmas(const char upper_left, const char upper_right,
    const char center, const char lower_left, const char lower_right) {
  if (center != 'A') {
    return false;
  }
  return upper_left == 'M' && upper_right == 'M' && lower_left == 'S' && lower_right == 'S'
    || upper_left == 'M' && upper_right == 'S' && lower_left == 'M' && lower_right == 'S'
    || upper_left == 'S' && upper_right == 'M' && lower_left == 'S' && lower_right == 'M'
    || upper_left == 'S' && upper_right == 'S' && lower_left == 'M' && lower_right == 'M';
}

int main() {
  std::string line[3];
  int count = 0;
  int line_number = 0;
  while (std::getline(std::cin, line[++line_number % 3])) {
    if (line_number < 3) {
      continue;
    }
    for (int index = 1; index < line[(line_number - 1) % 3].size() - 1; index++) {
      if (is_xmas(
            line[(line_number - 2) % 3][index - 1], line[(line_number - 2) % 3][index + 1],
            line[(line_number - 1) % 3][index],
            line[line_number % 3][index - 1], line[line_number % 3][index + 1]
      )) {
        count++;
      }
    }
  }
  std::cout << count << std::endl;
  return EXIT_SUCCESS;
}