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#include <iostream>

using namespace std;


char board[3000][3000];


unsigned nChoosek( unsigned n, unsigned k )
{
    if (k > n) return 0;
    if (k * 2 > n) k = n-k;
    if (k == 0) return 1;

    int result = n;
    for( int i = 2; i <= k; ++i ) {
        result *= (n-i+1);
        result /= i;
        result &= 100000007;
    }
    return result;
}



int main(){

	int n,k;
	cin >> n >> k;

	for(int y=0; y<n; y++){
		for(int x=0; x<n; x++){
			char c;
			cin >> board[y][x];

		}
	}

	long long ones = 0;

	for(int y=0; y<n; y++){
		for(int x=0; x<n; x++){
			if(board[y][x]=='#'){
				if(y > 0 && board[y-1][x] == '.'){
					board[y-1][x] = '1';
					ones++;
				}

				if(y < n-1 && board[y+1][x] == '.'){
					board[y+1][x] = '1';
					ones++;
				}

				if(x > 0 && board[y][x-1] == '.'){
					board[y][x-1] = '1';
					ones++;
				}

				if(x < n-1 && board[y][x+1] == '.'){
					board[y][x+1] = '1';
					ones++;
				}

			}
		}
	}


	if(k == 1){
		cout << ones << "\n";
		return 0;
	}


	long long twos = 0;





	for(int y=0; y<n; y++){
		for(int x=0; x<n; x++){
			if(board[y][x]=='1'){
				if(y > 0 && board[y-1][x] == '.'){
					// board[y-1][x] = '2';
					// second[y-1][x]++;
					twos++;
					
				}

				if(y < n-1 && board[y+1][x] == '.'){
					// board[y+1][x] = '2';
					// second[y+1][x]++;
					twos++;
					
				}

				if(x > 0 && board[y][x-1] == '.'){
					// board[y][x-1] = '2';
					// second[y][x-1]++;
					twos++;
					
				}

				if(x < n-1 && board[y][x+1] == '.'){
					// board[y][x+1] = '2';
					// second[y][x+1]++;
					twos++;
					
				}

			}
		}
	}

	cout << nChoosek(ones, 2) % 100000007 + twos << "\n"; 


}