import sys
sys.setrecursionlimit(1000000000)

#
# Solution Template for A Mindbending Scenario
# 
# This file is provided to assist with reading of input and writing of output
# for the problem. You may modify this file however you wish, or
# you may choose not to use this file at all.
#

r1_x1 = 0
r1_y1 = 0
r1_x2 = 0
r1_y2 = 0
r2_x1 = 0
r2_y1 = 0
r2_x2 = 0
r2_y2 = 0

# Read the input.
r1_x1, r1_y1, r1_x2, r1_y2 = map(int, input().strip().split())
r2_x1, r2_y1, r2_x2, r2_y2 = map(int, input().strip().split())

# TODO: This is where you should compute the answer and store it into the
# variable answer.

answer = 0

# Write the answer.
print(answer)