#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <utility>
#include <algorithm>
#include <cmath>
#include <string>
#include <fstream>
using namespace std;
typedef long long int ll;
#define forn(i, n) for(int (i) = 0; (i) < (n); (i)++)
#define fora(i, arr) for(auto (i) = (arr).begin(); (i) != (arr).end(); (i)++)
#define ford(i, n, j, m) for(int (i) = 0; (i) < (n); (i)++) for(int (j) = 0; (j) < (m); (j)++)
#define fors(i, a, n) for(int (i) = (a); (i) < (n); (i)++)
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define sortf(a) sort(all(a))
#define lin(arr, t, n) int (n); cin >> (n); vector<t> (arr)((n)); forn(i, n) cin >> (arr)[i]
#define lini(arr) forn(i, (arr).size()) cin >> (arr)[i]

#ifdef _MSC_VER
#define DEBUG(s) cout << (s);
#define DEBUGE(s) cout << (s) << endl;
#define DEBEND cout << endl;
#else
#define DEBUG(s)
#define DEBUGE(s)
#define DEBEND
#endif

typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int, int> pi;
typedef pair<ll, ll> pll;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
#ifndef _MSC_VER
    ifstream cin("input.txt");
    ofstream cout("output.txt");
#endif
    int n, k;
    cin >> n >> k;
    vector<set<int>> graph(n);
    forn(i, n) {
        forn(j, n) {
            int a;
            cin >> a;
            if (a) {
                graph[i].insert(j);
            }
        }
    }
    vector<bool> good(n);
    vector<bool> used(n);
    int curg = n;
    forn(i, n) {
        forn(i, n) {
            good[i] = 0;
            if ((int)graph[i].size() >= k && curg - (int)graph[i].size() - 1 >= k) {
                good[i] = 1;
            }
        }
        forn(i, n) {
            if (!good[i] && !used[i]) {
                for (auto j : graph[i]) {
                    graph[j].erase(i);
                }
                graph[i].clear();
                used[i] = 1;
                curg--;
            }
        }
    }
    int c = 0;
    forn(i, n) {
        c += good[i];
    }
    cout << c << endl;
    forn(i, n) {
        if (good[i]) cout << i + 1 << " ";
    }
    cout << endl;
#ifdef _MSC_VER
    std::system("pause");
#endif
    return 0;
}