#include <vector>
struct Donkey;
struct Cage
{
std::vector<Donkey> donkeys;
};
struct Donkey
{
};
int main()
{
Cage c;
}
CiNpbmNsdWRlIDx2ZWN0b3I+CgpzdHJ1Y3QgRG9ua2V5OwoKc3RydWN0IENhZ2UKewoJc3RkOjp2ZWN0b3I8RG9ua2V5PiBkb25rZXlzOwp9OwoKc3RydWN0IERvbmtleQp7Cn07CgppbnQgbWFpbigpCnsKICAgIENhZ2UgYzsKfQo=