#include <iostream>
 
using namespace std;
void Fns(int a[],int low,int high)
{
    if(low>=high)return ;
    int pivot=low;
    int temp;
    int i=low,j=low+1;
    while(i<=j&&j<=high)
    {
        while(i+1<=high&&a[i+1]<a[pivot])
               i++;
       j=i+1;
       while(j<=high&&a[j]>=a[pivot])
                j++;
        if(j<=high)
        {
             temp=a[i+1];
            a[i+1]=a[j];
            a[j]=temp;
            j++;
           i++;
        }
    }
temp=a[i];
a[i]=a[pivot];
a[pivot]=temp;
Fns(a,pivot,i-1);
Fns(a,i+1,high);
}
int TotalSum(int *a,int j,int k)
{  int tempi=-1;
    int i=0,count=0;
    while(i<=j)
    {
        if(a[i]+a[j]==k)
         {   
             count++;
             i++;
          if(i&&a[i-1]==a[i]&&tempi==-1)
           tempi=i-1;
          else if(i+1<=j&&a[i+1]!=a[i]&&tempi!=-1)
          {
              i=tempi;
              j--;
              tempi=-1;
          }
         }
         else if(a[i]+a[j]>k)
         {
             j--;
         }
         else
          i++;
    }
return count;
}
 
int main()
{
 
  int a[12];
  for(int i=0;i<=11;i++)
  cin>>a[i];
  Fns(a,0,11);
  for(int j=0;j<=11;j++)
  cout<<a[j]<<" ";
  int k;
  cin>>k;
  cout<<endl<<TotalSum(a,11,k);
  return 0;
}
 

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