#include <iostream>
using namespace std;
int main() {
int r, e, z, o;
cin >> r >> e >> z >> o;
if (r > e && r > z && r > o)
cout << "Rodion";
else if (e > r && e > z && e > o)
cout << "Erali";
else if (z > r && z > e && z > o)
cout << "Zalina";
else
cout << "Olya";
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CiAgICBpbnQgciwgZSwgeiwgbzsKICAgIGNpbiA+PiByID4+IGUgPj4geiA+PiBvOwogICAgaWYgKHIgPiBlICYmIHIgPiB6ICYmIHIgPiBvKQogICAgICAgIGNvdXQgPDwgIlJvZGlvbiI7CiAgICBlbHNlIGlmIChlID4gciAmJiBlID4geiAmJiBlID4gbykKICAgICAgICBjb3V0IDw8ICJFcmFsaSI7CiAgICBlbHNlIGlmICh6ID4gciAmJiB6ID4gZSAmJiB6ID4gbykKICAgICAgICBjb3V0IDw8ICJaYWxpbmEiOwogICAgZWxzZQogICAgICAgIGNvdXQgPDwgIk9seWEiOwogICAgcmV0dXJuIDA7Cn0KCg==