import java.util.*;

public class number11559{
    static class Hotel{
    	public int price;
    	public boolean isEnough = true;
    	public Hotel(int price, boolean isEnough){
    		this.price = price;
    		this.isEnough = isEnough;
    	}


    }

    public static void main(String args[]){
     	Scanner sc = new Scanner(System.in);
     	while(sc.hasNext()){
     		int n = sc.nextInt();
	     	int b = sc.nextInt();
	     	int h = sc.nextInt();
	     	int w = sc.nextInt();

	     	Hotel[] hotellist = new Hotel[h];
 	     	

	    	
	     	for(int i = 0; i < h; i++){
	     		int p = sc.nextInt();
	     		boolean isEnough = false;
	     		for(int j = 0; j < w; j++){
	     			int acc = sc.nextInt();
	     			if(acc >= w){
	     				isEnough = true;
	     			}
	     		}
	     		Hotel ho = new Hotel(p * n, isEnough);
	     		hotellist[i] = ho;
	     	}
	     
	     	boolean inBudget = true;
	     	int min = 0;
	     	for(int i = 0; i < hotellist.length; i++){
	     		if(hotellist[i].isEnough == true){
	     			if(hotellist[i].price < hotellist[min].price ){
	     				min = i;
	     			}	
	     		} 
	     	}	

	     	if(hotellist[min].price >= b){
	     		inBudget = false;
	     	}

	     	if(!inBudget){
	     		System.out.println("stay home");
	     	} else {
	     		System.out.println(hotellist[min].price);
	     	}

     	}
    }   
}