#include <iostream>
#include <string>
using namespace std;
int
main()
{
string huh;
for (int i = 0;i <=2;i++)
{
getline(cin, huh);
cout << "?\n";
}
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3RyaW5nPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50Cm1haW4oKQp7CiAgc3RyaW5nIGh1aDsKICBmb3IgKGludCBpID0gMDtpIDw9MjtpKyspCiAgICB7CiAgICAgIGdldGxpbmUoY2luLCBodWgpOwogICAgICBjb3V0IDw8ICI/XG4iOwogICAgfQogIHJldHVybiAwOwp9