#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
int main()
{
	int num(0);string s;
	cin>>s;
	for(int i=0,j=1;i<s.size()-2;i++)
		if(s[i]!='-')
		{
			num+=(s[i]-'0')*j;
			j++;
		}
	num%=11;
	if(num==10)
		num='X';
	if(num!=s[s.size()-1]-'0'&&num!=s[s.size()-1])
	{
		s.erase(s.size()-1,1);
		cout<<s;
		if(num=='X')
			cout<<'X';
		else cout<<num;
	}
	else
		cout<<"Right";
	cout<<endl;
	return 0;
}
/**************************************************************
	Problem: 2276
	User: admin
	Language: C++
	Result: Accepted
	Time:49 ms
	Memory:2076 kb
****************************************************************/