import java.util.*;
public class Main{
    public static void main(String args[]){
        Scanner sc=new Scanner (System.in);
        int m=sc.nextInt();
        int n=sc.nextInt();
        if(n<0 || m<0){
            System.out.println("Invalid input");
            return;
        }
        int [][] arr=new int[m][n];
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                arr[i][j]=sc.nextInt();
                if(arr[i][j]<0){
                    System.out.println("Invalid input");
                    return;
                }
            }
        }
        int target=sc.nextInt();
        if(target!=arr[i][j]){
            System.out.println("Invalid input");
            return;
        }
        int found=0;
        for(int i=0;i<m;i++){
            for(int j=0;j<n;j++){
                if(arr[i][j]==target)
                    found+=1;
                }
            }
            if(found==1)System.out.println("1");
            else{
            System.out.println(found);
            }
        }
    }