#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>

char map[100][100];
int visited[100][100];
int counter = 0;

bool isDrafty(int x, int y) {
  // Determines whether there's a trap in the immediate vicinity of the square we're standing on
  return (map[y][x] == '.' && (map[y+1][x] == 'T' || map[y-1][x] == 'T' || map[y][x+1] == 'T' || map[y][x-1] == 'T'));
}


void move(int mx, int my, int w, int h) {
  // Moves our x, y by 1 until a wall is found or becomes drafty
  char c = map[my][mx];

  // Avoid visiting visited nodes(endless loop occurs)
  if (visited[my][mx]) {
    return ;
  }
  visited[my][mx] = true;

  // Stop if drafty or wall. Increment counter if gold is found.
  if (c == '#') {
    return ;
  }

  // printf("x: %d, y: %d, c: %c\n", mx, my, c);

  if (c == 'G') {
    counter++;
  }

  if(c == 'T' || isDrafty(mx, my)){
    return ;
  }

  // Move (as long as we're not stepping out of bounds)
  if (mx < w) {
    move(mx+1, my, w, h);  //Right
  }
  if (my < h) {
    move(mx, my+1, w, h);  // Up
  }
  if (mx > 0) {
    move(mx-1, my, w, h);  //Left
  }
  if (my > 0) {
    move(mx, my-1, w, h);  // Down
  }

  return ;
}

int main(int argc, char **argv) {
  int w, h;
  scanf("%d %d", &w, &h);
  int px, py;

  // Populate map
  for (int i=0; i<h; i++) {
    for (int j=0; j<w; j++) {
      scanf(" %c", &map[i][j]);
      // Set player coordinates
      if (map[i][j] == 'P') {
        py = i;
        px = j;
      }
    }
  }

  for (int i=0; i < 100; i++) {
    for(int j=0; j < 100; j++) {
      visited[i][j] = false;
    }
  }

  // Initiate traversal
  move(px, py, w, h);

  // Print result
  printf("%d\n", counter);
  return 0;
}