#include
#include
#include
#include
using namespace std;
int main()
{
string s("Stroustrup");
list list1(s.begin(), s.end());
list1.sort();
list1.unique();
list::iterator i;
for (i = list1.begin(); i != list1.end(); ++i)
cout << *i;
return 0;
}
Soprstu"