#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <atcoder/modint>
#include <atcoder/dsu>

using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(int)(n); i++)
const i64 INF = 1001001001001001001;

using Modint = atcoder::static_modint<1000000007>;

bool testcase(){
    int N; cin >> N;
    vector<vector<int>> colors(3);
    rep(i,N){
        char c; int d; cin >> c >> d;
        if(c == 'R') colors[0].push_back(d);
        if(c == 'G') colors[1].push_back(d);
        if(c == 'B') colors[2].push_back(d);
    }
    rep(c,3) sort(colors[c].begin(), colors[c].end());
    colors.erase(remove_if(colors.begin(), colors.end(), [](const vector<int>& a){return a.empty();}), colors.end());
    if(colors.size() == 1) return true;
    if(colors.size() == 2){
        for(int c : colors[0]) if(binary_search(colors[1].begin(), colors[1].end(), c)) return true;
        return false;
    }
    rep(i,3){
        if(colors[1].size() > 1){
            vector<int> a0, a2;
            rep(c,colors[1].size()) if(binary_search(colors[0].begin(), colors[0].end(), colors[1][c])) a0.push_back(c);
            rep(c,colors[1].size()) if(binary_search(colors[2].begin(), colors[2].end(), colors[1][c])) a2.push_back(c);
            if(!a0.empty() && !a2.empty()){
                if(a0.size() > 1) return true;
                if(a2.size() > 1) return true;
                if(a0 != a2) return true;
            }
        } else {
            vector<int> a0, a2;
            rep(c,colors[1].size()) if(binary_search(colors[0].begin(), colors[0].end(), colors[1][c])) a0.push_back(c);
            rep(c,colors[1].size()) if(binary_search(colors[2].begin(), colors[2].end(), colors[1][c])) a2.push_back(c);
            if(!a0.empty() && !a2.empty()) return true;
        }
        swap(colors[0], colors[1]);
        swap(colors[1], colors[2]);
    }
    return false;
}

int main(){
    int T; cin >> T;
    rep(i,T){
        auto ans = testcase();
        cout << (ans ? "YES\n" : "NO\n");
    }
    return 0;
}


struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;