N,B,H,W =map(int,input().split())
ans = 9876543210
for i in range(H):
p = int(input())
L = list(map(int,input().split()))
for i in L:
if i >=N:
if p*N <= B and p*N < ans:
ans = p*N
if ans == 9876543210:
print("stay home")
else:
print(ans)