#include <iostream>
using namespace std;
 
int main() {
	int n;
	char c;
	cin>>n;
 
	for(int i=0;i<n;i++){
		cin>>c;
 
		if(c=='J')
			cout<<'O';
		else if(c=='O')
			cout<<"I";
		else
			cout<<"J";
 
	}
	return 0;
}
				I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CglpbnQgbjsKCWNoYXIgYzsKCWNpbj4+bjsKCQoJZm9yKGludCBpPTA7aTxuO2krKyl7CgkJY2luPj5jOwoJCQoJCWlmKGM9PSdKJykKCQkJY291dDw8J08nOwoJCWVsc2UgaWYoYz09J08nKQoJCQljb3V0PDwiSSI7CgkJZWxzZQoJCQljb3V0PDwiSiI7CgkJCgl9CglyZXR1cm4gMDsKfQ==