# import pypyjit
# pypyjit.set_param('max_unroll_recursion=-1')
from collections import defaultdict as dd
S = input
R = range
P = print
def I(): return int(S())
def M(): return map(int, S().split())
def L(): return list(M())
def O(): return list(map(int, open(0).read().split()))
def yn(b): print("Yes" if b else "No")
biga = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
smaa = "abcdefghijklmnopqrstuvwxyz"
def acc(a):
	b = [0]
	for i in a:
		b.append(b[-1] + i)
	return b

a, b, c, d = M()
if a + c <= 31 + b:
	print(1)
elif a + d <= 31 + b:
	print(2)
else:
	print(3)