#include <iostream>
#include <vector>
#include <string>
using namespace std;

int print_binary(size_t n, size_t k, string line, int quantityOfOnes) {
    if (line.length() == n) {
        if (quantityOfOnes == k) {
            cout << line << "\n";
            return 0;
        }
    }
    if (quantityOfOnes > k) {
        return 0;
    }
    print_binary(n, k, line + "0", quantityOfOnes);
    print_binary(n, k, line + "1", quantityOfOnes + 1);
}

int main() {
    size_t n, k;
    cin >> n >> k;
    string line = "";
    print_binary(n, k, line, 0);
}