#include <iostream>

using namespace std;

const int N = 55;
char a[N][N];

int main() {
	int n, m, sx = 0, sy = 0, zx = 0, zy = 0;	
	cin >> n >> m;
	for (int i = 1; i <= n; i ++)
		for (int j = 1; j <= m; j ++)
			cin >> a[i][j];
	for (int i = 1; i <= n; i ++) {
		for (int j = 1; j <= m; j ++)
			if (a[i][j] == '*') {
				sx = i, sy = j;
				break;
			}
		if (sx != 0) break;
	}
	for (int i = n; i >= 1; i --) {
		for (int j = m; j >= 1; j --) {
			if (a[i][j] == '*') {
				zx = i, zy = j;
				break;
			}
		}
		if (zx != 0) break;
	}
	if (sx == 0 || zx == 0) return 0;
	for (int i = sx; i <= zx; i ++) {
		for (int j = sy; j <= zy; j ++) 
			cout << a[i][j];
		puts("");
	}
	return 0;
}