B.cpp

#include <iostream>

using namespace std;

int main() {
    int a, b, c;
    cin >> a >> b >> c;

    if (a-b==0)
        cout << "S" << endl;
    else if (b-c==0)
        cout << "S" << endl;
    else if (a-c==0)
        cout << "S" << endl;
    else if ((a+b)-c == 0)
        cout << "S" << endl;
    else if ((a+c)-b == 0)
        cout << "S" << endl;
    else if ((b+c)-a == 0)
        cout << "S" << endl;
    else
        cout << "N" << endl;
    return 0;
}