#include <iostream>
#include <cstring>
using namespace std;
char s[100005];
int sum=0;
bool flag=0;
int main()
{
    cin>>s;
    int j=1;
    for (int i=0;i<strlen(s)-1;i++)
    {
        if(s[i]=='-') continue;
        int x=s[i]-'0';
        if(i==(strlen(s)-1)&&(s[i]-'0')==(sum%11))
        {
            cout<<"Right"<<endl;
            flag=1;
            break;
        }
        sum+=x*j++;
        // cout<<sum<<" "<<sum%11<<endl;
    }
    if(flag==0)
    {
        for (int i=0;i<(strlen(s)-1); i++)
        {
            cout<<s[i];
        }
        if(sum%11==10)
        {
            cout<<"X"<<endl;
        }
        else
        {
            cout<<sum%11<<endl;
        }
    }
    return 0;
}