#include <bits/stdc++.h>
// #include <boost/multiprecision/cpp_int.hpp>
using namespace std;
// using bigint = boost::multiprecision::cpp_int;

template <typename T> using min_priority_queue = priority_queue<T,vector<T>,greater<T>>;

random_device seed_gen;
mt19937 engine(seed_gen());

int64_t get_time_ns(){
    struct::timespec t;
    clock_gettime(CLOCK_MONOTONIC, &t);
    return t.tv_sec * int64_t(1'000'000'000) + t.tv_nsec;
}

bool solve() {
    int h, w;
    cin >> h >> w;
    vector<string> S(h);
    for(auto &s : S) cin >> s;

    for(int i = 0; i < h; i++) {
        for(int j = 0; j <= w-4; j++) {
            if(S[i].substr(j, 4) == "LOVE") return 1;
        }
    }
    return 0;
}

int main() {
    bool ans = solve();
    if(ans) cout << "YES" << endl;
    else cout << "NO" << endl;
}