#include<bits/stdc++.h>

using namespace std;

const string COLORS = "BGR";

int main() {
  int T;
  cin >> T;
  while (T--) {
    int N;
    cin >> N;
    vector< int > C(N), D(N);
    int type = 0;
    for (int i = 0; i < N; i++) {
      char c;
      cin >> c >> D[i];
      --D[i];
      C[i] = COLORS.find(c);
      type |= 1 << C[i];
    }
    type = __builtin_popcount(type);
    if(type == 1) {
      cout << "YES" << endl;
    } else if(type == 2) {
      sort(D.begin(), D.end());
      D.erase(unique(D.begin(), D.end()), D.end());
      if(D.size() != N) {
        cout << "YES" << endl;
      } else {
        cout << "NO" << endl;
      }
    } else {
      vector< int > perm{0, 1, 2};
      bool yes = false;
      do {
        vector< int > bit(N);
        vector< int > sz(3);
        for (int i = 0; i < N; i++) {
          bit[D[i]] |= 1 << perm[C[i]];
          sz[perm[C[i]]]++;
        }
        {
          vector< int > dp(4);
          dp[0] = 1;
          for(int i = 0; i < N; i++) {
            vector< int > nxt = dp;
            for(int j = 0; j < 4; j++) {
              if ((bit[i] & 0b110) == 0b110) {
                nxt[j | 1] |= dp[j];
              }
              if ((bit[i] & 0b011) == 0b011) {
                nxt[j | 2] |= dp[j];
              }
            }
            dp = nxt;
          }
          yes |= dp[3];
        }
        {
          bool all = false;
          for(auto& p : bit) all |= p == 0b111;
          yes |= all and sz[1] == 1;
        }
      } while (next_permutation(perm.begin(), perm.end()));
      if(yes) {
        cout << "YES" << endl;
      } else {
        cout << "NO" << endl;
      }
    }
  }
}