#include <cstdlib>
#include <iostream>
#include <random>

const std::string symbols = "ABCDEFGHIJKLMNOPQRSTUVWXYZ!?@*";

int main(int argc, char *argv[]) {
    if (argc != 5) {
        std::cerr << "Usage: " << argv[0] << " n min max seed" << std::endl;
        return 1;
    }
    unsigned n = atoi(argv[1]);
    int min = atoi(argv[2]);
    int max = atoi(argv[3]);
    int seed = atoi(argv[4]) * n;

    std::mt19937 twister(seed);
    std::uniform_int_distribution<int> values(min, max);
    std::uniform_int_distribution<int> chars(0, n - 1);

    std::vector<bool> used(n);
    for (unsigned i = 0; i < n; ++i) {
        int index;
        do {
            index = chars(twister);
        } while (used[index]);
        used[index] = true;
        std::cout << symbols[index];
    }
    std::cout << "\n";
    for (unsigned row = 0; row < n; ++row) {
        for (unsigned col = row; col < n; ++col) {
            if (col != row) std::cout << " ";
            std::cout << values(twister);
        }
        std::cout << "\n";
    }
    return 0;
}