#include <bits/stdc++.h>
 
//#include <unistd.h>
//#include <iostream>
 
using namespace std;
 
#define DEBUG(x) cerr<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cerr<<#v<<":";for(int i=0;i<v.size();i++) cerr<<" "<<v[i]; cerr<<endl;
#define DEBUG_MAT(v) cerr<<#v<<endl;for(int i=0;i<v.size();i++){for(int j=0;j<v[i].size();j++) {cerr<<v[i][j]<<" ";}cerr<<endl;}
typedef long long ll;
#define int ll
 
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
template<class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first + t.first, s.second + t.second); }
template<class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); }
template<class S, class T> ostream& operator<<(ostream& os, pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; }
#define X first
#define Y second
#define rep(i,n) for(int i=0;i<(n);i++)
#define rep1(i,n) for(int i=1;i<=(n);i++)
#define rrep(i,n) for(int i=(n)-1;i>=0;i--)
#define rrep1(i,n) for(int i=(n);i>0;i--)
#define REP(i,a,b) for(int i=a;i<b;i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(),c.end()
template<class T> bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a = b; return 1; } return 0; }
#define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end());
const ll inf = 1000000001;
const ll INF = (ll)1e18 + 1;
const long double pi = 3.1415926535897932384626433832795028841971L;
#define Sp(p) cout<<setprecision(25)<< fixed<<p<<endl;
//int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
//int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
vi dx = {1, 0, -1, 0}, dy = {0, 1, 0, -1};
vi dx2 = { 1,1,0,-1,-1,-1,0,1 }, dy2 = { 0,1,1,1,0,-1,-1,-1 };
#define fio() cin.tie(0); ios::sync_with_stdio(false);
const ll MOD = 1000000007;
//const ll MOD = 998244353;
// #define mp make_pair
//#define endl '\n'

int n;
vii G;

vi num(3);
vi color;

void dfs(int now, int par, int d) {
    color[now] = d;
    for (int ch: G[now]) {
        if (ch == par) continue;
        int nd;
        if (d == 1) nd = 2;
        else nd = 1;
        dfs(ch, now, nd);
    }
}


bool solve(int root) {
    vi num(3);
    rep1 (i, n) {
        num[i % 3]++;
    }

    dfs(0, -1, root);
    vi num2(3);
    rep (i, n) {
        num2[color[i]]++;
    }
    // DEBUG_VEC(color);
    // DEBUG_VEC(num2);

    if (num2[1] >= num[1] and num2[2] >= num[2]) {
        rep (i, n) {
            int c = color[i];
            if (num2[c] > num[c]) {
                num2[c]--;
                color[i] = 0;
                num2[0]++;
            }
        }
    }
    else {
        int tc;
        if (num2[1] < num[1]) tc = 1;
        else tc = 2;
        rep (i, n) {
            if (color[i] == tc) {
                num2[tc]--;
                num2[0]++;
                color[i] = 0;
            }
        }

        rep (i, n) {
            if (num2[color[i]] > num[color[i]]) {
                rep (j, 3) {
                    if (num2[j] < num[j]) {
                        num2[color[i]]--;
                        color[i] = j;
                        num2[j]++;
                        break;
                    }
                }
            }
        }
    }

    if (num2 != num) return false;
    // DEBUG_VEC(color);
    // DEBUG_VEC(num);
    // DEBUG_VEC(num2);

    vi nex(3);
    rep1 (i, 3) nex[i % 3] = i;
    rep (i, n) {
        cout << nex[color[i]] << " ";
        nex[color[i]] += 3;
    }
    cout << endl;
    return true;
}


signed main() {
    fio();
    cin >> n;
    G.resize(n);
    color.resize(n);
    rep (i, n - 1) {
        int u, v;
        cin >> u >> v;
        u--; v--;
        G[u].push_back(v);
        G[v].push_back(u);
    }


    rep1 (root, 2) {
        if (solve(root)) return 0;
    }
    cout << -1 << endl;
}

Measured memory_bytes: 17920