include[HTML_REMOVED]

include[HTML_REMOVED]

include[HTML_REMOVED]

include[HTML_REMOVED]

using namespace std;
vector[HTML_REMOVED] q;
int main()
{
int n;
cin>>n;
while(n>0)
{
n–;
q.push_back(‘A’+n%26);
n/=26;
}
for(int i=q.size()-1;i>=0;i–) cout<<q[i];
return 0;
}