import socket;
import time;
sock = socket.socket();
sock.connect(('pwnable.kr', 9007 ))
menu = sock.recv(2048);
time.sleep(3);
for level in range(100):
    data = sock.recv(1024);
    print(data);
    m = data.split(' ');
    l=0;
    r=int(m[0][2:]);
    c=int(m[1][2:]);
    for i in range(c):
        gu ='';
        m=(l+r)/2;
        for j in range(l,m):
            gu+=str(j)+" "
        sock.send(gu +"\n")
        result = int(sock.recv(1024).strip());
        if result%10==0:
            l = m
        else :
            r=m
    sock.send(str(l)+"\n")
    print(sock.recv(1024))
print(sock.recv(1024))