#include<fstream>
#include<algorithm>
using namespace std;
ifstream in("note.in");
ofstream out("note.out");
int x[515][1030],matrice[515][1030]={{0}},n,m,v,solf[1030]={0};

void citire()
{
    in>>v>>n;
    for(int i=1;i<=v;i++)
        for(int j=1;j<=n;j++)
            in>>x[i][j];
    in>>m;
    for(int i=1;i<=m;i++)
        in>>solf[i];
}

int verificare(int a,int j)
{
    for(int i=1;i<=v;i++)
        if(x[i][j]==a)
            return 1;
    return 0;
}

int main ()
{
    int i,j;
    citire();

     for(i=1;i<=n;i++) matrice[0][i]=i;
     for(i=1;i<=m;i++) matrice[i][0]=i;

    for(i=1;i<=m;i++)
    {
        for(j=1;j<=n;j++)
        {
            if(verificare(solf[i],j)==0)
                matrice[i][j]=min(min(matrice[i-1][j],matrice[i-1][j-1]),matrice[i][j-1])+1;
            else
                matrice[i][j]=matrice[i-1][j-1];
        }
    }
    out<<matrice[m][n]<<'\n';
    return 0;
}