a1 = int(input())
b1 = int(input())
a2 = int(input())
b2 = int(input())
if (a2 > a1 and a2 < b1 > b2) or ( a2 > a1 and a2 < b1 == b2) or (a2 == a1 and b1 > b2) or (a1 == a2 and b1 == b2):
print(a2,b2)
elif (a2 == a1 and b2 > b1) or (a2 < a1 and b2 == b1) or (a2 < a1 and b2 > b1):
print(a1,b1)
elif (a1 < a2 > b1 and b2 > b1) or (a2 < a1 < b2 and b2 < b1):
if a2 > a1 and b2 > b1:
print(a2,b1)
elif a2 < a1 < b2 and b2 < b1:
print(a2,a1)
elif a1 < a2 == b1 < b2:
print(b1)
elif a2 < a1 == b2 < b1:
print(b2)
else:
print("пустое множество")