Untitled

#include <iostream>
#include <vector>

using namespace std;

int main() {
    int k, t, match = 1;
    cin >> k >> t;
    string poem[k];
    getline(cin, poem[0]);
    for (int i = 0; i < k; i++) {
        getline(cin, poem[i]);
    }

    for (int i = 0; i < k - 1; i++) {
        int cur_match = 1;
        for (int j = i + 1; j < k; j++) {
            if (poem[i].substr(poem[i].length() - t) == poem[j].substr(poem[j].length() - t)) ++cur_match;
        }
        match = max(match, cur_match);
    }

    cout << match;
    return 0;
}