#include <bits/stdc++.h>
using namespace std;
using pi = pair<int, int>;
using bs = bitset<1000>;

signed main() {
    int v, d;
    cin >> v >> d;
    vector<bs> G(v);
    for (int i = 0; i < v; ++i) {
        string s;
        cin >> s;
        for (int j = 0; j < v; ++j)
            if (s[j] == '1') G[i].set(j);
    }

    bool valid = true;
    
    for (int src = 0; valid && src < v; ++src) {
        if (!G[src].any()) {
            valid = false;
            break;
        }
        
        bs pos, onext, enext;
        pos.set(src);
        enext.set(src);
        int mv = 0;
        while (mv < d) {
            for (int i = 0; i < v;++i)
                if (pos[i]) onext |= G[i];
            if (!(pos ^ onext).any()) break;
            pos = onext;
            ++mv;
            if (mv >= d) break;
            for (int i = 0; i < v; ++i)
                if (pos[i]) enext |= G[i];
            if (!(pos ^ enext).any()) break;
            pos = enext;
            ++mv;
            if (mv >= d) break;
        }
        if((d%2 ? onext.count() : enext.count()) < v) valid = false;
    }
    cout << (valid ? "Yes" : ":(") << endl;
}