#include <iostream>
using namespace std;
int main()
{ int i;
int a[10]={1,2,3,4,5,6,7,8,9,10};
for(i=9;i>=0;i--)
{
cout<<a[i]<<" ";
}
cout<<endl;
for(i=9;i>=0;i--)
{
cout<<2*a[i]<<" ";
}
return 0;
}