#include <iostream>
#include <vector>
#include <queue>
#include <cstring>
#include <map>
#include <fstream>
using namespace std;
typedef long long ll;
const int maxn = 1e6 + 2;

int main() {
    ios_base::sync_with_stdio(false);
    vector<int> v(4);
    for(int i = 0; i < 4; i++) {
        v[i] = i + 1;
    }

    do {
        for(int i = 0; i < 4; i++) {
            cout << v[i] << " " ;
        }
        cout << endl;
    } while(next_permutation(v.begin(), v.end()));
}