// template version 1.15
using namespace std;
#include <bits/stdc++.h>

// varibable settings
#define int long long
const int INF=1e18;

// define basic macro {{{
#define _overload3(_1,_2,_3,name,...) name
#define _rep(i,n) repi(i,0,n)
#define repi(i,a,b) for(int i=(int)(a);i<(int)(b);++i)
#define rep(...) _overload3(__VA_ARGS__,repi,_rep,)(__VA_ARGS__)
#define _rrep(i,n) rrepi(i,0,n)
#define rrepi(i,a,b) for(int i=(int)((b)-1);i>=(int)(a);--i)
#define rrep(...) _overload3(__VA_ARGS__,rrepi,_rrep,)(__VA_ARGS__)
#define each(i,a) for (auto&& i : a)
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define pb(a) push_back(a)
#define mp(a, b) make_pair(a, b)
#define mt(a, b, c) make_tuple(a, b, c)
#define ub upper_bound
#define lb lower_bound
#define posl(A, x) (lower_bound(all(A), x)-A.begin())
#define posu(A, x) (upper_bound(all(A),x)-A.begin())
template<class T> inline void chmax(T &a, const T &b) { if((a) < (b)) (a) = (b); }
template<class T> inline void chmin(T &a, const T &b) { if((a) > (b)) (a) = (b); }

#define divceil(a,b) ((a)+(b)-1)/(b)
#define is_in(x, a, b) ((a)<=(x) && (x)<(b))
#define uni(x) sort(all(x));x.erase(unique(all(x)),x.end())
#define slice(l, r) substr(l, r-l)

typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef long double ld;
typedef pair<int,int> pii;
typedef tuple<int,int,int> iii;

template<typename T> using PQ = priority_queue<T, vector<T>, greater<T>>;
struct Fast { Fast(){ std::cin.tie(0); ios::sync_with_stdio(false); } } fast;

#if defined(PCM) || defined(LOCAL)
    #include "lib/dump.hpp"
#else
    #define dump(...) 42
    #define dump_1d(...) 42
    #define dump_2d(...) 42
    #define cerrendl 42
#endif
//}}}

template<typename T> struct SegmentTree { // {{{
    private:
        using F = function<T(T,T)>;
        int n;  // 元の配列のサイズ
        int N;  // n以上の最小の2冪
        vector<T> node;
        F merge;
        T identity;

    public:
        SegmentTree(){}
        SegmentTree(vector<T> a, F f, T id):merge(f), identity(id) {
            n = a.size();
            N = 1; while(N < n) N *= 2;
            node.resize(2*N-1, identity);
            for(int i=0; i<n; i++) node[i+N-1] = a[i];
            for(int i=N-2; i>=0; i--) node[i] = merge(node[2*i+1], node[2*i+2]);
        }
        SegmentTree(int n, F f, T id) : SegmentTree(vector<T>(n, id), f, id) {}

        T& operator[](int i) { return node[i+N-1]; }

        void update(int x, T val) {
            x += (N - 1);
            node[x] = val;
            while(x > 0) {
                x = (x - 1) / 2;
                node[x] = merge(node[2*x+1], node[2*x+2]);
            }
        }

        void add(int x, T val) {
            x += (N - 1);
            node[x] += val;
            while(x > 0) {
                x = (x - 1) / 2;
                node[x] = merge(node[2*x+1], node[2*x+2]);
            }
        }

        // query for [l, r)
        T query(int a, int b, int k=0, int l=0, int r=-1) {
            if(r < 0) r = N;
            if(r <= a || b <= l) return identity;
            if(a <= l && r <= b) return node[k];

            T vl = query(a, b, 2*k+1, l, (l+r)/2);
            T vr = query(a, b, 2*k+2, (l+r)/2, r);
            return merge(vl, vr);
        }

        friend ostream& operator<<(ostream &os, SegmentTree<T>& sg){ //
            os << "[";
            for(int i=0; i<sg.n; i++){
                os << sg[i] << (i==sg.n-1?"]\n":", ");
            }
            return os;
        }
};
// }}}

struct tree{/*{{{*/
    int n;
    vector<int> par;  // par[i]: dfs木における親
    vector<int> cost;  // par[i]: dfs木における親への辺のコスト
    vector<int> dfstrv; // dfstrv[i]: dfs木でi番目に訪れるノード。dpはこれを逆順に回す
    vector<int> ord;  // ord[u]: uのdfs木における訪問順
    vector<int> pos;  // pos[u]: uのdfs終了時のカウンター
    vector<int> psize; // psize[u]: uのpartial tree size
    // vの部分木は[ord[v], pos[v])
    // ordとdfstrvは逆変換

    vector<int> depth;  // depth[i]: dfs木でのiの深さ
    vector<int> ldepth;  //  ldepth[i]: dfs木でのrootからの距離
    vector<vector<pair<int, int>>> g; // 辺(隣接リスト)
    vector<vector<int>> children;
    vector<int> euler_tour;
    vector<int> et_fpos;  // euler_tour first occurence position
    SegmentTree<int> _seg;  // seg(map(ord, euler_tour), mymin, 1e18)

    int _counter = 0;

    tree(int n):
        n(n),par(n),cost(n,1),ord(n),pos(n),
        psize(n),depth(n),ldepth(n),g(n),children(n),et_fpos(n)
    {};

    void add_edge(int u, int v, int cost){
        g[u].emplace_back(v, cost);
        g[v].emplace_back(u, cost);
    }
    void add_edge(int u, int v){
        g[u].emplace_back(v, 1);
        g[v].emplace_back(u, 1);
    }

    void build(int root){
        _counter = 0;
        par[root] = -1;
        cost[root] = INF;
        _dfs_tree(root, -1);
        _dfs_et(root);
        vector<int> ini(2*n-1); rep(i, 2*n-1) ini[i] = ord[euler_tour[i]];
        _seg = SegmentTree<int>(ini, [](auto a, auto b){return min(a,b);}, 1e18);
    }

    void _dfs_tree(int u, int pre){
        dfstrv.pb(u);
        ord[u] = _counter;
        if (pre!=-1){
            depth[u] = depth[pre]+1; 
            ldepth[u] = ldepth[pre]+cost[u]; 
        }

        _counter++;
        each(el, g[u]){
            int v = el.first;
            if (v==pre) continue;

            children[u].pb(v);
            par[v] = u;
            cost[v] = el.second;
            _dfs_tree(v, u);
        }
        pos[u] = _counter;
        psize[u] = pos[u] - ord[u];
    }

    void _dfs_et(int u){
        et_fpos[u] = euler_tour.size();
        euler_tour.pb(u);
        each(v, children[u]){
            _dfs_et(v);
            euler_tour.pb(u);
        }
    }

    int lca(int u, int v){
        if (u==v) return u;
        if (et_fpos[u]>et_fpos[v]) swap(u, v);
        return dfstrv[_seg.query(et_fpos[u], et_fpos[v])];
    }

    int dist(int u, int v){
        int p = lca(u, v);
        return depth[u] + depth[v] - 2*depth[p];
    }
    int ldist(int u, int v){  // length dist
        int p = lca(u, v);
        return ldepth[u] + ldepth[v] - 2*ldepth[p];
    }
    pair<int, int> diameter(){
        int u, v;
        int max_len = *max_element(all(ldepth));
        rep(i, n){
            if(ldepth[i]==max_len){
                u = i; break;
            }
        }
        int md = -1;
        rep(i, n){
            int d = ldist(u, i);
            if (d>md){ v = i; md = d; }
        }
        return mp(u, v);
    }

};/*}}}*/

signed main() {
    int n;cin>>n;
    tree tr(n);
    rep(i, n-1){
        int a,b;cin>>a>>b;
        a--;b--;
        tr.add_edge(a, b);
    }
    tr.build(0);
    dump(tr.depth);

    int mh = *max_element(all(tr.depth));
    vvi D(mh+1);

    int e = 0, o = 0;
    rep(i, n){
        if (tr.depth[i]%2==0) e++;
        else o++;
        D[tr.depth[i]].pb(i);
    }
    dump(e, o);
    dump(D);

    vi x0, x1, x2;
    rep(u, 1, n+1){
        if (u%3==0) x0.pb(u);
        if (u%3==1) x1.pb(u);
        if (u%3==2) x2.pb(u);
    }
    dump(x0);
    dump(x1);
    dump(x2);

    if (e>=n/3+1 && o>=n/3+1){
        vi ans(n);
        int j1 = 0, j2 = 0, j3 = 0;
        rep(i, n){
            if (tr.depth[i]%2==1){
                if (j1<sz(x1)){
                    ans[i] = x1[j1];
                    j1++;
                }
                else{
                    ans[i] = x0[j3];
                    j3++;
                }
            }
            else{
                if (j2<sz(x2)){
                    ans[i] = x2[j2];
                    j2++;
                }
                else{
                    ans[i] = x0[j3];
                    j3++;
                }
            }
        }
        dump(ans);
        rep(i, sz(ans)) cout << ans[i] << (i!=sz(ans)-1 ? " " : "\n");
    }
    else if (e<=n/3){
        vi ans(n);
        int j1 = 0, j2 = 0, j3 = 0;
        rep(i, n){
            if (tr.depth[i]%2==0){
                ans[i] = x0[j3]; 
                j3++;
            }
            else{
                if (j1<sz(x1)){
                    ans[i] = x1[j1]; 
                    j1++;
                }
                else if (j2<sz(x2)){
                    ans[i] = x2[j2]; 
                    j2++;
                }
                else if (j3<sz(x0)){
                    ans[i] = x0[j3]; 
                    j3++;
                }
            }
        }
        dump(ans);
        rep(i, sz(ans)) cout << ans[i] << (i!=sz(ans)-1 ? " " : "\n");
    }
    else if (o<=n/3){
        vi ans(n);
        int j1 = 0, j2 = 0, j3 = 0;
        rep(i, n){
            if (tr.depth[i]%2==1){
                ans[i] = x0[j3]; 
                j3++;
            }
            else{
                if (j1<sz(x1)){
                    ans[i] = x1[j1]; 
                    j1++;
                }
                else if (j2<sz(x2)){
                    ans[i] = x2[j2]; 
                    j2++;
                }
                else if (j3<sz(x0)){
                    ans[i] = x0[j3]; 
                    j3++;
                }
            }
        }
        dump(ans);
        rep(i, sz(ans)) cout << ans[i] << (i!=sz(ans)-1 ? " " : "\n");
    }

    return 0;
}


Measured memory_bytes: 62524