#include <bits/stdc++.h>
#define N 10000
using namespace std;
ifstream fin("bac.in");
int main()
{
  char s[500]="",cuv[21][21];
  int n,i,k;
  cin>>n; cin.get();
  for(i=1;i<=n;i++)
  {
      cin>>cuv[i];
  }
  cin>>k;
  for(i=1;i<=n;i++)
    if(strlen(cuv[i])==k)
  {
      strcat(s,cuv[i]);
      strcat(s," ");
  }
  for(i=1;i<=n;i++)
    if(strlen(cuv[i])!=k)
  {
      strcat(s,cuv[i]);
      strcat(s," ");
  }
  s[strlen(s)-1]=NULL;
  cout<<s;
  return 0;
}