#include
#include
#include
#include
int main()
{
std::string abc = "abcdefghijklmnopqrstuvwxyz";
std::string name;
std::cin >> name;
for (const char &character : name)
{
abc.erase(std::remove(abc.begin(), abc.end(), tolower(character)), abc.end());
}
for (const char &character : abc)
{
std::cout << character << ' ';</p>
}
std::cout << std::endl;</p>
return 0;
}