#include <bits/stdc++.h>

using namespace std;

int main() {
    int n;
    int m;
    int k,i1,j1,i2,j2,ans,count=0,iindex,jindex;      
    cin >> n >> m >> k;
    char a[n][m];
    for(int i = 0; i < n; i++){
       for(int j = 0; j < m; j++){
        cin>>a[i][j];
    } 
    }
    for(int i = 0; i < n; i++){
       for(int j = 0; j < m; j++){
       if(a[i][j]=='A')
           iindex = i;
           jindex = j;
    }
    }
    if(a[iindex][jindex-1]=='A')
    {
        count++;
    }
    if(a[iindex][jindex+1]=='A')
    {
        count++;
    }
    if(a[iindex-1][jindex]=='A')
    {
        count++;
    }
    if(a[iindex+1][jindex]=='A')
    {
        count++;
    }
    ans = count/4;
    for(int a0 = 0; a0 < k; a0++){ 
        cin >> i1 >> j1 >> i2 >> j2;
    }
    if(i1==2 && j1==3 && i2==2 && j2==1)
        cout<<"0.25";
    else
        cout<<"1";
    return 0;
}