#include <cstdio>

#define pol(r, s, S) ((r)*(S)+(s))
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)

char tab[300][300];	// size is RS x RS+1
int R, S;

void load(int R, int S)
{
	char vstup[50];
	
	FOR (r, 0, R)
	{
		scanf("%s", vstup);
		FOR (s, 0, S)
		{
			tab[pol(r, s, S)][R*S] = (vstup[s] == '.' ? 0 : 1);
			tab[pol(r, s, S)][pol(r, s, S)] = 1;
			
			if (s != 0)
				tab[pol(r, s, S)][pol(r, s-1, S)] = 1;
			if (s != S-1)
				tab[pol(r, s, S)][pol(r, s+1, S)] = 1;
			if (r != 0)
				tab[pol(r, s, S)][pol(r-1, s, S)] = 1;
			if (r != S-1)
				tab[pol(r, s, S)][pol(r+1, s, S)] = 1;
		}
	}
}

void print()
{
	FOR(y, 0, R*S)
	{
		FOR (x, 0, R*S+1)
				printf("%d ", tab[y][x]);
		printf("\n");
	}
		
	printf("\n");
}

void eliminuj(int riadok)
{
	FOR (r, 0, R*S)
	{
		if (r != riadok && tab[r][riadok] == 1)
		{
			FOR (s, riadok, R*S+1)
				tab[r][s] = (tab[r][s] + tab[riadok][s]) % 2;
			
//			printf("elim %d pre %d:\n", riadok, r);
//			print();
		}
	}
}

void swap(int riadok1, int riadok2, int stlpec)
{
	int pom;
	FOR(s, stlpec, R*S+1)
	{
		pom = tab[riadok1][s];
		tab[riadok1][s] = tab[riadok2][s];
		tab[riadok2][s] = pom;
	}
}

bool jednicka(int riadok)
{
	if (tab[riadok][riadok] == 1)
		return 0;
	
	bool ok = true;
	FOR (r, riadok, R*S)
		if (tab[r][riadok] == 1)
		{
			swap(r, riadok, riadok);
			ok = false;
			break;
		}
		
	return ok;
}

int gem(int riadok)
{
	FOR (r, riadok, R*S)
	{
		if (jednicka(r))
			return r;
		eliminuj(r);
	}
	
	return 0;
}

int main()
{
	scanf("%d", &R);
	int gemret;	

	while (R != 0)
	{
		scanf("%d", &S);
		
		FOR (x, 0, R*S)
			FOR (y, 0, R*S+1)
				tab[x][y] = 0;
		
		load(R, S);
		
//		printf("poloade:\n");
//		print();
		
		if (!(gemret = gem(0)))
		{
			int sum = 0;
			FOR(r, 0, R*S)
				sum += tab[r][R*S];
			printf("You have tap to %d tiles.\n", sum);
			scanf("%d", &R);
			break;
		}

		int volnych = R*S-gemret;

		FOR (r, gemret, R*S)
		{
			tab[r][r] = 1;
			tab[r][R*S] = 0;
		}
		
		if (!gem(gemret))
		{
			int sum = 0;
			FOR(r, 0, R*S)
					sum += tab[r][R*S];
			printf("You have tap to %d tiles.\n", sum);
			scanf("%d", &R);
			break;
		}
		else
		{
			printf("Damaged billboard.\n");
		}
		
		scanf("%d", &R);
	}
}