/* Aa^~ kokoro ga pyonpyon suru n jaa^~
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*/

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

using VI = vector<int>;
using VVI = vector<VI>;
using PII = pair<int, int>;
using LL = long long;
using VL = vector<LL>;
using VVL = vector<VL>;
using PLL = pair<LL, LL>;
using VS = vector<string>;

#define ALL(a)  begin((a)),end((a))
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define MT make_tuple
#define SZ(a) int((a).size())
#define SORT(c) sort(ALL((c)))
#define RSORT(c) sort(RALL((c)))
#define UNIQ(c) (c).erase(unique(ALL((c))), end((c)))

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

#define FF first
#define SS second

template<class S, class T>
istream& operator>>(istream& is, pair<S,T>& p){
  return is >> p.FF >> p.SS;
}
template<class T>
istream& operator>>(istream& is, vector<T>& xs){
  for(auto& x: xs)
	is >> x;
  return is;
}
template<class S, class T>
ostream& operator<<(ostream& os, const pair<S,T>& p){
  return os << p.FF << " " << p.SS;
}
template<class T>
ostream& operator<<(ostream& os, const vector<T>& xs){
  for(unsigned int i=0;i<xs.size();++i)
	os << (i?" ":"") << xs[i];
  return os;
}
template<class T>
void maxi(T& x, T y){
  if(x < y) x = y;
}
template<class T>
void mini(T& x, T y){
  if(x > y) x = y;
}
void debug(istringstream&){}
template <char sep=',', class Head, class... Tail>
void debug(istringstream& iss, Head&& head, Tail&&... tail)
{
  string name;
  getline(iss, name, ',');
  cout << sep << name << "=" << head;
  debug(iss, forward<Tail>(tail)...);
}

#ifdef PYONPOI
#define DEBUG(...) \
  do{ \
    istringstream ss(#__VA_ARGS__); \
    debug<' '>(ss, __VA_ARGS__); \
    cout<<endl; \
  }while(0)
#else
#define DEBUG
#endif
void init_io(int argc, char* argv[]){
  cin.tie(0);
  ios_base::sync_with_stdio(false);
#ifdef PYONPOI
  if(argc > 1) {
    ifstream *ifs = new ifstream();
    ifs->open(argv[1]);
    cin.rdbuf(ifs->rdbuf());
  }
#endif
}


const double EPS = 1e-10;
const double PI  = acos(-1.0);
const LL MOD = 1e9+7;

void dfs(VVI& G, int u, int p, int d, VVI& dep){
  dep[d%2].PB(u);

  for(int v : G[u]){
    if(v == p) continue;
    dfs(G, v, u, d+1, dep);
  }
}

int main(int argc, char* argv[]){
  init_io(argc, argv);

  int N;
  cin >> N;
  VVI G(N);

  REP(i,N-1){
    int u, v;
    cin >> u >> v;
    --u;
    --v;
    G[u].PB(v);
    G[v].PB(u);
  }

  VVI dep(N);
  dfs(G, 0, -1, 0, dep);

  VI num(3);
  FOR(i,1,N+1) num[i%3]++;
  VI ans(N, 0);

  {
    VI ns(2);
    for(int i=0;i<N;++i){
      ns[i % 2] += SZ(dep[i]);
    }

    int b = (ns[0] >= ns[1] ? 0 : 1);
    for(int i=b;i<N;i+=2){
      while(!dep[i].empty() && num[1] > 0){
        int u = dep[i].back();
        dep[i].pop_back();
        ans[u] = 1;
        --num[1];
      }
    }
  }

  {
    VI ns(2);
    for(int i=0;i<N;++i){
      ns[i % 2] += SZ(dep[i]);
    }

    int b = (ns[0] >= ns[1] ? 0 : 1);
    for(int i=b;i<N;i+=2){
      while(!dep[i].empty() && num[2] > 0){
        int u = dep[i].back();
        dep[i].pop_back();
        ans[u] = 2;
        --num[2];
      }
    }
  }

  VI iter = {3, 1, 2};
  VI out(N);
  REP(i,N){
    out[i] = iter[ans[i]];
    iter[ans[i]] += 3;
  }
  cout << out << endl;

  return 0;
}


Measured memory_bytes: 27124