#include<bits/stdc++.h>
using namespace std;

int main(){
  vector<int> a={1,2,3,4,6,7,12,21,28};
  int p=5;
  for (int &x:a) x*=p;
  a.push_back(1);
  int n=a.size();
  cout<<n<<endl;
  for (int i=0;i<n;i++) cout<<a[i]<<" \n"[i==n-1];
}