#include <iostream>
#include <algorithm>
#include <string>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <cctype>

using namespace std;

const int N = 1010;


int main()
{
    std::ios::sync_with_stdio(false);
    int w[N];
    int cnt = 0;
    cout << 64 << endl;
    printf("1\n2\n3\n4\n12\n13\n14\n21\n23\n24\n31\n32\n34\n41\n42\n43\n");
    string s = "123";
    do
    {
        w[cnt++] = (s[0] - '0') * 100 + (s[1] - '0') * 10 + (s[2] - '0'); 
    } while (next_permutation(s.begin(), s.end()));
    s = "124";
    do
    {
        w[cnt++] = (s[0] - '0') * 100 + (s[1] - '0') * 10 + (s[2] - '0'); 
    } while (next_permutation(s.begin(), s.end()));
    s = "134";
    do
    {
        w[cnt++] = (s[0] - '0') * 100 + (s[1] - '0') * 10 + (s[2] - '0'); 
    } while (next_permutation(s.begin(), s.end()));
    s = "234";
    do
    {
        w[cnt++] = (s[0] - '0') * 100 + (s[1]...