a = [5, 4, 2, 3, 2, 5, 6, 2, 6, 3, 1, 4, 2, 2, 6, 5, 6, 4]
ob = a[:6]
sh = a[6:12]
pr = a[12:18]
if sum(ob)>sum(sh) and sum(ob)>sum(pr):
    print (sum(ob))
elif sum(sh)>sum(ob) and sum(sh)>sum(pr):
    print (sum(sh))
elif sum(pr)>sum(ob) and sum(pr)>sum(sh):
    print (sum(pr))