#include <iostream>
#include <vector>
#include <cassert>

int main() {
    int n, k;
    std::cin >> n >> k;
    assert(1 <= k and k < n and n <= 200000);
    std::vector<std::vector<bool>> dp(n + k, std::vector<bool>(k + 1)); // declarer
    for (int i = 0; i <= k; i++) {
        dp.at(n - 1).at(i) = true;
    }
    for (int i = n - 2; i >= 0; i--) {
        std::vector<int> w;
        for (int j = 1; j <= k; j++) {
            if (dp.at(i + j).at(j)) {
                w.push_back(j);
            }
        }
        if (w.size() == 0) {
            for (int j = 1; j <= k; j++) {
                dp.at(i).at(j) = true;
            }
        } else if (w.size() == 1) {
            dp.at(i).at(w.at(0)) = true;
        }
    }
    bool win = false;
    for (int i = 1; i <= k; i++) {
        if (dp.at(i).at(i)) {
            win = true;
            std::cout << i << std::endl;
        }
    }
    if (!win) {
        std::cout << 0 << std::endl;
    }
}