#include <iostream>

using namespace std;


int main()
{
    int n,m,bit=0;
    cin>>n>>m;
    int a[n],b[m];
    for(int i=0;i<n;++i)
        {cin>>a[i];
        bit++;
        }
    for(int i=0;i<m;++i)
        cin>>b[i];
    cout<<bit<<endl;
    for(int i=0;i<n;++i)
        cout<<a[i]<<" ";
}