#include<bits/stdc++.h>
using namespace std;


int main()
{
    string s,a;
    while(cin>>s)
    {
        if(s=="#")
            break;
        a=s;
        next_permutation(s.begin(),s.end());

        if(s>a)
            cout<<s<<endl;
        else
            cout<<"No Successor"<<endl;
    }
    return 0;
}