#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define R cin>>
#define ll long long
#define ln cout<<endl
#define in(a) insert(a)
#define pb(a) push_back(a)
#define pd(a) printf("%.10f\n",a)
#define mem(a) memset(a,0,sizeof(a))
#define all(c) (c).begin(),(c).end()
#define iter(c) __typeof((c).begin())
#define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--)
#define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define rep(i,n) REP(i,0,n)
#define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++)
ll check(ll n,ll m,ll x,ll y){return x>=0&&x<n&&y>=0&&y<m;}void pr(){ln;}
template<class A,class...B>void pr(const A &a,const B&...b){cout<<a<<(sizeof...(b)?" ":"");pr(b...);}
template<class A>void PR(A a,ll n){rep(i,n)cout<<(i?" ":"")<<a[i];ln;}
const ll MAX=1e9+7,MAXL=1LL<<61,dx[8]={-1,0,1,0,-1,-1,1,1},dy[8]={0,1,0,-1,-1,1,1,-1};
typedef pair<ll,ll> P;

vector<string> C(vector<string> s) {
  ll n=s.size();
  rep(i,n)REP(j,i+1,n) swap(s[i][j],s[j][i]);
  return s;
}

ll n,m;
string s[1000];

ll calc(vector<string> t) {
  ll cnt=0;
  rep(k,m) {
    ll f=0;
    rep(l,2) {
      rep(i,n) {
        rep(j,n) {
          if(t[i].substr(0,s[k].size())==s[k]) f=1;
          rotate(t[i].begin(),t[i].begin()+1,t[i].end());
        }
      }
      t=C(t);
    }
    cnt+=f;
  }
  return cnt;
}

vector<string> ans;
ll MM;

void solve(vector<string> t) {
  ll d=calc(t);
  if(MM<d) {
    MM=d;
    ans=t;
  }
  rep(k,5) {
    random_shuffle(all(t));
    rep(i,n) rotate(t[i].begin(),t[i].begin()+rand()%n,t[i].end());
    ll d=calc(t);
    if(MM<d) {
      MM=d;
      ans=t;
    }
  }
}

void Main() {
  srand((unsigned)time(NULL));
  cin >> n >> m;
  rep(i,m) R s[i];
  vector<string> v[15];
  rep(i,m) v[s[i].size()].pb(s[i]);
  rep(e,30) {
    vector<string> t(n);
    rrep(i,15) {
      random_shuffle(all(v[i]));
      rep(j,v[i].size()) {
        ll M=MAX,x=0;
        string rr;
        rep(k,n) {
          rep(l,t[k].size()+1) {
            string r1=t[k].substr(l);
            if(r1.size()<=v[i][j].size()) {
              string r2=v[i][j].substr(0,r1.size());
              if(r1==r2) {
                ll d=t[k].size()+v[i][j].size()-r1.size();
                if(d<=n&&M>d) {
                  M=d;
                  x=k;
                  rr=t[k]+v[i][j].substr(r1.size());
                }
              }
            }
          }
        }
        if(rand()%5==0) M=MAX;
        if(M!=MAX) t[x]=rr;
      }
    }
    rep(i,n) {
      while(t[i].size()<n) {
        //t[i]+='.';
        t[i]+=(char)(rand()%8+'A');
      }
    }
    solve(t);
  }
  rep(i,n) pr(ans[i]);
}

int main(){Main();return 0;}

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<vector>
#include<cmath>
#include<algorithm>
#include<map>
#include<queue>
#include<deque>
#include<iomanip>
#include<tuple>
#include<cassert>
#include<set>
#include<complex>
using namespace std;
typedef long long int LL;
typedef pair<int,int> P;
typedef pair<LL,int> LP;
const int INF=1<<30;
const LL MAX=1e9+7;

void array_show(int *array,int array_n,char middle=' '){
    for(int i=0;i<array_n;i++)printf("%d%c",array[i],(i!=array_n-1?middle:'\n'));
}
void array_show(LL *array,int array_n,char middle=' '){
    for(int i=0;i<array_n;i++)printf("%lld%c",array[i],(i!=array_n-1?middle:'\n'));
}
void array_show(vector<int> &vec_s,int vec_n=-1,char middle=' '){
    if(vec_n==-1)vec_n=vec_s.size();
    for(int i=0;i<vec_n;i++)printf("%d%c",vec_s[i],(i!=vec_n-1?middle:'\n'));
}
void array_show(vector<LL> &vec_s,int vec_n=-1,char middle=' '){
    if(vec_n==-1)vec_n=vec_s.size();
    for(int i=0;i<vec_n;i++)printf("%lld%c",vec_s[i],(i!=vec_n-1?middle:'\n'));
}

vector<int> t;
LL su[220000][2];

int main(){
    int n,m;
    int i,j,k;
    LL a,b,c;
    LL s=1LL<<60;
    cin>>n>>m;
    for(i=0;i<n;i++){
        cin>>a;
        t.push_back(a);
    }
    sort(t.begin(),t.end());
    for(i=0;i<n;i++){
        su[i+1][0]=su[i][0];
        if(i%2)su[i+1][0]+=t[i]-t[i-1];
    }
    for(i=n-1;i>=0;i--){
        su[i][1]=su[i+1][1];
        if(i%2)su[i][1]+=t[i+1]-t[i];
    }
    vector<int> v1;
    for(i=0;i<m;i++){
        cin>>a;
        v1.push_back(a);
    }
    sort(v1.begin(),v1.end());
    for(i=0,j=0;i<m;i++){
        for(;j<n && t[j]<v1[i];j++);
        a=su[j][0]+su[j][1];
        if(j%2)a+=v1[i]-t[j-1];
        else a+=t[j]-v1[i];
        s=min(s,a);
    }
    cout<<s<<endl;
}