#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
cin >> n;
ios::sync_with_stdio(false);
cin.tie(nullptr);
vector<int> x(n), y(n);
vector<char> d(n);
vector<bool> active(n, true);
vector<bool> collided(n, false);
for (int i = 0; i < n; i++) {
cin >> x[i] >> y[i] >> d[i];
}
int xmax = *max_element(x.begin(), x.end());
int ymax = *max_element(y.begin(), y.end());
if (n == 1) {
cout << 1 << "\n";
return 0;
}
if (n == 2) {
int x1 = x[0], y1 = y[0], x2 = x[1], y2 = y[1];
char d1 = d[0], d2 = d[1];
bool collided = false;
for (int t = 0; t < 1000; t++) {
if (x1 == x2 && y1 == y2) {
collided = true;
break;
}
int px1 = x1, py1 = y1, px2 = x2, py2 = y2;
if (d1 == 'N') y1 -= 2;
else if (d1 == 'S') y1 += 2;
else if (d1 == 'E') x1 += 2;
else if (d1 == 'W') x1 -= 2;
if (d2 == 'N') y2 -= 2;
else if (d2 == 'S') y2 += 2;
else if (d2 == 'E') x2 += 2;
else if (d2 == 'W') x2 -= 2;
if (x1 == x2 && y1 == y2) {
collided = true;
break;
}
if (x1 == px2 && y1 == py2 && x2 == px1 && y2 == py1) {
collided = true;
break;
}
if (x1 > xmax || x1 < 0 || y1 > ymax || y1 < 0) break;
if (x2 > xmax || x2 < 0 || y2 > ymax || y2 < 0) break;
}
if (!collided) {
cout << 1 << "\n" << 2 << "\n";
}
return 0;
}
bool moving = true;
while (moving) {
moving = false;
for (int i = 0; i < n; i++) {
if (!active[i]) continue;
if (d[i] == 'N') y[i] -= 2;
else if (d[i] == 'S') y[i] += 2;
else if (d[i] == 'E') x[i] += 2;
else if (d[i] == 'W') x[i] -= 2;
if (x[i] > xmax || x[i] < 0 || y[i] > ymax || y[i] < 0) {
active[i] = false;
} else {
moving = true;
}
}
for (int i = 0; i < n; i++) {
if (!active[i]) continue;
for (int j = i + 1; j < n; j++) {
if (!active[j]) continue;
if (x[i] == x[j] && y[i] == y[j]) {
collided[i] = true;
collided[j] = true;
active[i] = false;
active[j] = false;
}
}
}
}
for (int i = 0; i < n; i++) {
if (!collided[i]) {
cout << i + 1 << "\n";
}
}
return 0;
}
