lst = []
for i in range(0, 26):
	lst.append(int(raw_input()))
countlist = []
countlist.append(lst[3])
countlist.append(lst[4])
countlist.append(lst[7])
countlist.append(lst[11]/3)
countlist.append(lst[14]/2)
countlist.append(lst[17])
countlist.append(lst[22])
countlist.sort()
print countlist[0]