#include <iostream>
using namespace std;
  
int main()
{ 
    int a;
    cin>>a;
    if (a<=150){cout<<"S";}
    else if (a>=151 && a<=160){cout<<"M";}
    else if (a>=161 && a<=170){cout<<"L";}
    else if (a>=171 && a<=180){cout<<"XL";}
    else {cout<<"XXL";}
    return 0;
}