import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

import sys
readline = sys.stdin.readline

# DEBUG = True
DEBUG = False

class Interactive:
    def __init__(self):
        self.ques_cnt = 0
        self.create_data()
        
    def create_data(self):
        import random
        self.x = random.randint(0,10**5)
        self.y = random.randint(0,10**5)
        print('created:', self.x, self.y)
        
    def resp_ques(self, *args):
        x,y = map(int,args)
        d = abs(x - self.x) + abs(y - self.y)
        if d == 0:
            print('AC')
            exit()
        return '{}\n'.format(d)
            
    def resp_ans(self, *args):
        pass
            
if DEBUG:
    interactive = Interactive()
    
def question(*args, offset=None):
    if offset is None:
        print(*args, flush=True)
    else:
        print(offset, *args, flush=True)
    if DEBUG:
        resp = interactive.resp_ques(*args)
        print(resp, end='')
        return resp
    else:
        return readline()
    
def answer(*args, offset=None):
    if offset is None:
        print(*args, flush=True)
    else:
        print(offset, *args, flush=True)
    if DEBUG:
        interactive.resp_ans(*args)
    else:
        exit()

U = 10 ** 9 + 10
d1 = int(question(0,0))
if d1 == 0:
    exit()
d2 = int(question(U,0))
if d2 == 0:
    exit()

y = (d1 + d2 - U) // 2
x = d1 - y
question(x,y)