#include <iostream>
using namespace std;
int main(){
int N, M, start, end;
cin >> N >> M;
for (int i = 0; i < M; ++i){
cin >> start >> end;
}
cout<<M+2<<endl;
for (int i = 0; i < N; ++i){
cout<<1<<' ';
}
cout<<'\n';
for (int i = 1; i <= M; ++i){
cout<<1<<' ';
for (int j = 1; j <= M; ++j){
if (j==i){
cout<<1<<' ';
}else{
cout<<2<<' ';
}
}
cout<<'\n';
}
for (int i = 0; i < N; ++i){
cout<<1<<' ';
}
cout<<'\n';
}
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