#include <iostream>

using namespace std;

constexpr int MAX_N = 151;
bool cards_flipped[MAX_N];

void simulate() {
    for (int divider=2; divider<MAX_N; divider++) {
        for (int i=divider; i<MAX_N; i+=divider) {
            cards_flipped[i] = !cards_flipped[i];
        }
    }
}

void print_ans() {
    int amount = 0;
    bool first = true;
    for (int i = 1; i < MAX_N; i++) {
        if (!cards_flipped[i]) {
            if (!first) cout << " ";
            cout << "N" << i;
            first = false;
            amount++;
        }
    }
    cout << endl << amount << endl;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    simulate();
    print_ans();


    return 0;
}