l1, r1 = int(input()), int(input())
l2, r2 = int(input()), int(input())
l3, r3 = int(input()), int(input())


class Item:
    def __init__(self, left_side, right_side):
        self.left_side = left_side
        self.rigth_side = right_side


m1 = Item(l1, r1)
m2 = Item(l2, r2)
m3 = Item(l3, r3)

a = [m1, m2, m3]
a.sort()
a