// head of mylib.h

#include <bits/stdc++.h>

using ll = long long;
using ull = unsigned long long;
using pi = std::pair<ll, ll>;

#define chmin(x, a) ((x) = std::min({(x), (a)})
#define chmax(x, a) ((x) = std::max({(x), (a)})

template <class T>
class V : public std::vector<T> {
    typedef std::vector<T> vector;

  public:
    using vector::begin;
    using vector::end;
    using vector::operator[];
    using vector::back;
    using vector::clear;
    using vector::const_iterator;
    using vector::empty;
    using vector::erase;
    using vector::front;
    using vector::insert;
    using vector::iterator;
    using vector::pop_back;
    using vector::push_back;
    using vector::rbegin;
    using vector::rend;
    using vector::resize;
    using vector::size;
    using vector::vector;

    ll sum() const {
        ll x = 0;
        std::cout << "sum()" << std::endl;
        return x;
    }
    ll max() const {
        ll x = std::numeric_limits<ll>::min();
        std::cout << "max()" << std::endl;
        return x;
    }
    ll min() const {
        ll x = std::numeric_limits<ll>::max();
        std::cout << "min()" << std::endl;
        return x;
    }
};

template <class T>
using VV = V<V<T>>;

template <class T>
std::ostream& operator<<(std::ostream& os, const V<T>& v) {
    for (auto itr = v.begin(); itr != v.end();++itr)
        os << (itr != v.begin() ? " " : "") << *itr;
    os << std::endl;
    return os;
}
template <class T>
std::istream& operator>>(std::istream& is, V<T>& v) {
    for (auto& i : v) is >> i;
    return is;
}

void fin(const char* str){
    std::cout << str << std::endl;
    exit(0);
}

// end of mylib.h

using namespace std;

#define MAX_LEN 1000

int main() {
    int v, d;
    cin >> v >> d;
    using bs = bitset<MAX_LEN>;
    V<bs> E(v);
    for (auto& i : E) {
        string str;
        cin >> str;
        reverse(str.begin(), str.end());
        i = bs(str);
    }
    const int pwrdp = 20; // 2^20 > 640000 > 2^19
    VV<bs> dp(pwrdp, V<bs>(v));
    dp[0] = E;
    for (int i = 1; i < pwrdp; ++i) {
        for (int j = 0; j < v;++j){
            for (int k = dp[i - 1][j]._Find_first(); k < v; k = dp[i - 1][j]._Find_next(k)) {
                dp[i][j] |= dp[i - 1][k];
            }
        }
    }

    V<bs> Rchbl(v), x, emp(v);
    bool rempty = true;
    for (int di = 0, dd = d; dd > 0; ++di, dd /= 2) {
        if(dd&1){
            if(rempty){
                Rchbl = dp[di];
                rempty = false;
            } else {
                x = emp;
                for (int i = 0; i < v; ++i) {
                    for (int j = Rchbl[i]._Find_first(); j < v; j = Rchbl[i]._Find_next(j)) {
                        x[i] |= dp[di][j];
                    }
                }
                Rchbl = x;
            }
        }
    }
    for (int i = 0; i < v;++i)
        if (Rchbl[i].count() < v) return cout << "No" << endl, 0;
    cout << "Yes" << endl;
}

/*
int main() {
    int v, d;
    cin >> v >> d;
    using bs = bitset<MAX_LEN>;
    V<bs> E(v);
    for (auto& i : E) {
        string str;
        cin >> str;
        reverse(str.begin(), str.end());
        i = bs(str);
    }
    
    for (int i = 0; i < v; ++i) {
        bs reachable = E[i], back1, back2;
        back1[i] = true;
        // already consumed 1 turn for reachable
        for (int j = 0; j < d - 1; ++j) {
            bs diff = reachable ^ back2;  // back1 ^ back2
            if (diff.none()) break;
            back2 = back1;
            for (int k = diff._Find_first(); k < v; k = diff._Find_next(k))
                back1 |= E[k];
            swap(reachable, back1);
        }
        if (reachable.count() < v) return cout << "No" << endl, 0;
    }
    cout << "Yes" << endl;
}
*/