#include <iostream>
#include <stdio.h>
#include <string>
using namespace std;

struct frc{
	long long int num;
	long long int den;
	frc(long long int n, long long int d): num(n), den(d){}
	frc(): num(1), den(1){}
};

frc add(frc f1, frc f2){
	if(f1.den < f2.den){
		long long int b = f2.den/f1.den;
		return frc(f1.num * b + f2.num, f2.den);
	}
	if(f1.den > f2.den){
		long long int b = f1.den/f2.den;
		return frc(f1.num + f2.num * b, f1.den);
	}
	long long int num = f1.num + f2.num;
	long long int den = f1.den;
	if(num == 0) return frc(0,1);
	while(num%2 == 0){
		num /= 2;
		den /= 2;
	}
	return frc(num, den);
}

frc div2(frc f){
	if(f.num == 0) return frc(0,1);
	return frc(f.num, f.den*2);
}

ostream& operator<<(ostream& out, frc f){
	out << f.num << "/" << f.den << " ";
	return out;
}

int main() {
	int n, m;
	//scanf("%d%d", &n, &m);
	cin >> n >> m;
	bool d[60][60];
	for(int i = 1; i <= n; i++){
		string s;
		while(1){
			getline(cin, s);
			if(s.length() > 0) break;
		}
		//cout << s.length() << endl;
		int idx = 0;
		for(int j = 0; ; j++){
			if(s[j] == ' ') continue;
			if(s[j] == '*') d[i][idx] = 1;
			else if(s[j] == '.') d[i][idx] = 0;
			idx ++;
			if(idx == i) break;
		}
	}
	/*
	for(int i = 1; i <= n; i++){
		for(int j = 0; j < i; j++){
			cout << d[i][j] << " ";
		}
		cout << endl;
	}*/
	frc p[60][120];
	p[1][0] = frc(1,1);
	for(int i = 2; i <= n; i++){
		for(int k = 0; k < i-1; k++){
			if(d[i-1][k]) p[i][2*k+1] = frc(0,1);
			else p[i][2*k+1] = p[i-1][2*k];
		}
		for(int k = 0; k < i; k++){
			frc res(0,1);
			if(k > 0 && d[i-1][k-1]) res = add(res, div2(p[i-1][2*k-2]));
			if(k > 0 && k < i-1) res = add(res, p[i-1][2*k-1]);
			if(k < i-1 && d[i-1][k]) res = add(res, div2(p[i-1][2*k]));
			p[i][2*k] = res;
		}
	}
	/*
	for(int j = 1; j <= n; j++){
	for(int i = 0; i <= 2*j-2; i++){
		cout << p[j][i];
	}
	cout << endl;
	}
	cout << endl;
	*/
	frc ans(0,1);
	if(m != 0) ans = add(ans, div2(p[n][2*m-2]));
	if(m != 0 && m != n) ans = add(ans, p[n][2*m-1]);
	if(m != n) ans = add(ans, div2(p[n][2*m]));
	printf("%I64d/%I64d\n", ans.num, ans.den);
	return 0;
}