#include <bits/stdc++.h>
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
cin >> n >> m;
vector<vector<int>> adj(n);
for (int i = 0, u, v; i < m; ++i) {
cin >> u >> v;
adj[u].push_back(v), adj[v].push_back(u);
}
cout << n + 1 << '\n';
for (int i = 0; i < n; ++i) {
cout << "0 ";
}
cout << '\n';
for (int c = 1; c < n; ++c) {
for (int i = 0; i < n; ++i) {
cout << c << ' ';
}
cout << '\n';
}
cout << '\n';
for (int i = 0; i < n; ++i) {
cout << "0 ";
}
cout << '\n';
}
