#include<bits/stdc++.h>

using namespace std;

#define INF 1000010000
#define nl '\n'
typedef long long ll;

ll gcd(ll a, ll b) {
    return b ? gcd(b, a % b) : abs(a);
}

ll lcm(ll a, ll b) {
    return abs( a / gcd(a, b) * b );
}

string DecToBin(int n){
    string ans = "";
    while(n != 0){
        ans = ((n % 2)?"1":"0") + ans;
        n/=2;
    }
    return ans;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.precision(0);
    int n;
    cin >> n;
    string str = DecToBin(n);
    for( int i = 1 ; i < str.length() ; ++i )
        cout << "S" << ( str[i] == '1' ? "X" : "");
    return 0;
}