#include <iostream>
#include<array>
#include <bits/stdc++.h>
#include<string>
using namespace std;
int main ()



{
    int npar,bug,weeks,h,hbug,minamount=100000;
    bool available=false;

    while(scanf("%d %d %d %d\n", &npar, &bug, &h, &weeks)!=EOF){
        int aweeks;
        minamount=10000000;
        while(h--){
            cin>>hbug;

                for(int i=0;i<weeks;i++){
                    cin>>aweeks;
                    if(aweeks>=npar){
                        available=true;
                        minamount=min(minamount,npar*hbug);
                        string s;
                    getline(cin, s);
                        break;

                }
            }
        }
        if( minamount!=10000000 && minamount<=bug)
            cout<<minamount<<endl;
        else cout<<"stay home"<<endl;
    }
    return 0;
}