import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class No3558 {
	
	public static String[][] str;

	public static void main(String[] args) throws IOException{
		
		String[] strings = readStr();
		int n = Integer.parseInt(strings[0]);
		
		str = new String[strings.length-1][strings[1].length()];
		for(int i = 1;i < strings.length;i++) {
			str[i-1] = strings[i].split(""); 
		}
		
		int[] lxy = new int[2], rxy = new int[2] ;
		int count = 0;
		
		lxy = getXY("#");
		rxy = getXY(".");

		while(!check(lxy, rxy)) {
			count += Math.abs(rxy[0] - lxy[0]) + Math.abs(rxy[1] - lxy[1]);
			str[lxy[1]][lxy[0]] = ".";
			str[rxy[1]][rxy[0]] = "#";
			
			lxy = getXY("#");
			rxy = getXY(".");
		}

		System.out.println(count);
		

	}
	
	public static boolean check(int[] lxy,int[] rxy) {
		boolean result = false;
		
		if(lxy[0] == -1 && lxy[1] == -1 && rxy[0] == -1 && rxy[1] == -1) {
			result = true;
		}
		
		return result;
	}
	
	public static int[] getXY(String bw) {
		int[] resultXY = {-1 , -1};
		boolean flg = false;
		int sx = 0;
		
		if(".".equals(bw)) {
			sx = str.length;
		}
		
		for(int y = 0;y < str.length;y++) {
			for(int x = sx;x < str.length + sx;x++) {
				if(bw.equals(str[y][x])) {
					resultXY[0] = x;
					resultXY[1] = y;
					flg = true;
					break;
				}
			}
			if(flg) {
				break;
			}
		}
		
		return resultXY;
	}
	
	public static String[] readStr() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		ArrayList<String> list = new ArrayList<>();

		do {
			list.add(br.readLine());
		}while(br.ready());

		br.close();

		String[] text = new String[list.size()];
		list.toArray(text);

		return text;

	}

}