#include<bits/stdc++.h> using namespace std; int main() { int x; cin>>x; if(x<=150) cout<<"S"; else if(x>=151&&x<=160) cout<<"M"; else if(x>=161&&x<=170) cout<<"L"; else if(x>=171&&x<=180) cout<<"XL"; else if(x>=181) cout<<"XXL";

return 0;

}