#!/usr/bin/python2
# -*- coding: utf-8 -*-
# †
import sys

def ask(x, y):
    print '{x} {y}'.format(**locals())
    sys.stdout.flush()
    dist = int(raw_input())
    if dist == 0:
        exit(0)
    return dist


dist1 = ask(0, 0)
dist2 = ask(dist1, 0)
assert dist2 % 2 == 0
y = dist2 / 2
x = dist1 - y
ask(x, y)