#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("atestat.in");
struct nod
{
    int info;
    nod *urm, *ant;
}*p, *q, *prim, *ultim;
int x,s;
void citire()
{
    prim=NULL;
    while(fin>>x)
    {
            p=new nod;
            p->info=x;
            p->urm=NULL;
            if(prim==NULL)
            {
                prim=p;
                p->ant=NULL;
                ultim=p;
            }
            else
            {
                ultim->urm=p;
                p->ant=ultim;
                ultim=p;
            }
            s=s+x;
    }
}
void tip()
{
    p=prim;
    while(p!=NULL)
    {
        cout<<p->info<<" ";
        p=p->urm;
    }
    cout<<"\n";
}
void tip2()
{
    p=ultim;
    while(p!=NULL)
    {
        cout<<p->info<<" ";
        p=p->ant;
    }
    cout<<"\n";
}
void rez()
{
    q=new nod;
    q->info=s;
    q->urm=prim;
    q->ant=NULL;
    prim=q;
}
int main()
{
    citire();
    tip2();
    rez();
    tip();
    return 0;
}