#include <fstream>

using namespace std;

int main() {
	ifstream in("in.txt");
	ofstream out("out.txt");
	int k, l;
	in >> k >> l;
	int *g = new int [k * l];
	for (int i = 0; i < k; ++i) {
		for (int j = 0; j < l; ++j) {
			in >> g[i * l + j];
		}
	}
	int *matchX = new int[k];
	int *matchY = new int[l];
	bool *visited = new bool[l];
	for (int i = 0; i < k; ++i) {
		matchX[i] = -1;
	}
	for (int j = 0; j < l; ++j) {
		matchY[j] = -1;
	}
	for (int i = 0; i < k; ++i) {
		int current = i;
		for (int s = 0; s < l; ++s) {
			visited[s] = false;
		}
		while (true) {
			int v = -1;
			for (int p = 0; p < l; ++p) {
				if (!visited[p] && g[current * l + p] == 1) {
					v = p;
					break;
				}
			}
			if (v == -1) {
				out << "N\n";
				out << i + 1;
				return 0;
			}
			if (matchY[v] == -1) {
				matchX[current] = v;
				matchY[v] = current;
				break;
			}
			else {
				int next = matchY[v];
				matchX[current] = v;
				matchY[v] = current;
				current = next;
				visited[v] = true;
			}
		}
	}
	for (int j = 0; j < l; ++j) {
		if (matchY[j] == -1) {
			out << "N\n";
			out << k;
			return 0;
		}
	}
	out << "Y\n";
	for (int i = 0; i < k; ++i) {
		out << matchX[i] + 1 << " ";
	}
	in.close();
	out.close();
	return 0;
}