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#include <iostream>
#include <cstdio>
#include <vector>

using namespace std;

char c;
bool czy, tutaj;
int n, m, a, b, x;
int BFS[1005];
int tab[1005][1005];
int result[1005];
bool ktore[1005];

vector <int> V[1005];
vector <int> T[1005];
vector <int>::iterator it;

bool probuj (vector <int> v, int ojciec)
{
	if (v.size() == 1)
	{
		result[v[0]] = ojciec;
		return 1;
	}
	for (int i = 0; i < v.size(); ++i)
	{
		bool dobry = 1;
		for (int j = 0; j < v.size(); ++j)
		{
			if (tab[v[j]][v[i]] == -1)
			{
				dobry = 0;
				break;
			}
		}
		if (dobry)
		{
			int xx = v[i];
			result[xx] = ojciec;
			int odw[1005];
			for (int j = 0; j < v.size(); ++j) odw[v[j]] = 0;
			odw[xx] = 1;
			for (int j = 0; j < v.size(); ++j) if (odw[v[j]] == 0)
			{
				BFS[a = b = 0] = v[j];
				odw[v[j]] = 1;
				vector <int> w;
				w.clear();
				w.push_back(v[j]);
				while (a <= b)
				{
					int xxx = BFS[a];
					for (vector <int>::iterator iter = T[xxx].begin(); iter != T[xxx].end(); ++iter)
					{
						if ((ktore[*iter] == 1) && (odw[*iter] == 0))
						{
							b++;
							odw[*iter] = 1;
							BFS[b] = *iter;
							w.push_back(*iter);
						}
					}
					a++;
				}
				for (int k = 0; k < v.size(); ++k) ktore[v[k]] = 0;
				for (int k = 0; k < w.size(); ++k) ktore[w[k]] = 1;
				dobry = probuj(w, xx);
				for (int k = 0; k < v.size(); ++k) ktore[v[k]] = 1;
				if (dobry == false) break;
			}
		}
		if (dobry) return true;
	}
	return false;
}

int main ()
{
	scanf("%d%d", &n, &m);
	for (int i = 1; i <= n; ++i) tab[i][i] = -1;
	for (int i = 0; i < m; ++i)
	{
		scanf("%d %d %c", &a, &b, &c);
		if (c == 'N') tab[a][b] = -1;
		else
		{
			V[a].push_back(b);
			T[a].push_back(b);
			T[b].push_back(a);
		}
	}
	for (int i = 1; i <= n; ++i)
	{
		BFS[a = b = 0] = i;
		while (a <= b)
		{
			x = BFS[a];
			for (it = V[x].begin(); it != V[x].end(); ++it)
			{
				if (tab[i][*it] == -1)
				{
					printf("NIE\n");
					return 0;
				}
				if (tab[i][*it] == 0)
				{
					tab[i][*it] = 1;
					BFS[++b] = *it;
				}
			}
			a++;
		}
	}
	for (int i = 1; i <= n; ++i) for (int j = 1; j <= n; ++j)
	{
		if (tab[i][j] == 1)
		{
			if (tab[j][i] == 1)
			{
				printf("NIE\n");
				return 0;
			}
			tab[j][i] = -1;
		}
	}
	for (int i = 1; i <= n; ++i) tab[i][i] = 1;
	for (int i = 1; i <= n; ++i)
	{
		tutaj = 0;
		for (int j = 1; j <= n; ++j)
		{
			if (tab[j][i] == -1)
			{
				tutaj = 1;
				break;
			}
		}
		if (tutaj == 0)
		{
			czy = 1;
			break;
		}
	}
	if (czy == 0)
	{
		printf("NIE\n");
		return 0;
	}
	for (int i = 1; i <= n; ++i) V[0].push_back(i);
	for (int i = 1; i <= n; ++i) ktore[i] = 1;
	if (probuj(V[0], 0) == false)
	{
		printf("NIE\n");
		return 0;
	}
	for (int i = 1; i <= n; ++i) printf("%d\n", result[i]);
	return 0;
}