qbhv

//#include<bits/stdc++.h>
#include<iostream>
#include<fstream>
#include<vector>
#include<algorithm>
#include<set>

#define long long long
#define nln '\n'

const long N = 20;

using namespace std;

// GLobal variables: cow, m, n, a

fstream f1,f2;

inline void openf()
{
    f1.open("qbhv.inp", ios:: in);
    f2.open("qbhv.out", ios:: out);
}

inline void closef()
{
    f1.close();
    f2.close();
}

string str;
long n;
vector<short> a;

void data()
{
    f1.tie(0)->sync_with_stdio(0);
    f2.tie(0)->sync_with_stdio(0);
    //cin.tie(0)->sync_with_stdio(0);
    cin >> str;
    n = str.size();

    for (long i = 0; i != n; ++i)
        a.push_back(i);
}

set<string> sav;

void show()
{
    string tem = "";
    for (const auto &i : a)
        tem += str[i];
    sav.insert(tem);
}

void swap(long &a, long &b)
{
    long itm = a;
    a = b;
    b = itm;
}

bool stop = 0;

void gen()
{
    long i = n-2;
    while (a[i] > a[i+1] && i != -1)
        --i;
    if (i == -1)
    {
        stop = 1;
        return;
    }

    long j = n-1;
    while (a[j] < a[i])
        --j;

    swap(a[i], a[j]);

    long lef = i+1, rig = n-1;
    while (lef < rig)
    {
        swap(a[lef], a[rig]);
        ++lef; --rig;
    }
}

void process()
{
    while (!stop)
    {
        show();
        gen();
    }
}

void view()
{
    cout << sav.size() << nln;
    for (const auto &i : sav)
        cout << i << nln;
}

int main()
{
    openf();
    data();
    process();
    view();
    closef();
    return 0;
}