#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <map>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <stack>
#include <algorithm>
#include <array>
#include <unordered_set>
#include <unordered_map>
#include <string>
using namespace std;

bool rcmp(int a, int b) { return a>b; }
typedef long long LL;
class mypcmp {
public:
    bool operator()(const int& a, const int& b) {
        return a<b;
    }
};


char mk[200004];
int qq[200004];
int main() {
    int n, i, v, h=0, x3, x5, x6, x7;
    char ib[8], c;
    int cs[4];
    memset(mk, 0, sizeof(mk));
    int tc; scanf("%d", &tc); while(tc) { tc--;
        for (i=0; i<h; i++) mk[qq[i]]=0;
        scanf("%d", &n);
        cs[0]=cs[1]=cs[2]=0;
        h=0; for (i=0; i<n; i++) {
            scanf("%s %d", ib, &v);
            if (ib[0]=='B') c=0; else if (ib[0]=='G') c=1; else c=2;
            cs[c]++;
            if (mk[v]==0) qq[h++]=v; 
            mk[v]|=(1<<c);
        }
        x3=0; for (i=0; i<h; i++) if ((mk[qq[i]]&3)==3) x3++;
        x5=0; for (i=0; i<h; i++) if ((mk[qq[i]]&5)==5) x5++;
        x6=0; for (i=0; i<h; i++) if ((mk[qq[i]]&6)==6) x6++;
        x7=0; for (i=0; i<h; i++) if ((mk[qq[i]]&7)==7) x7++;
        if (cs[0]==0) {
            if (cs[1]==0||cs[2]==0) printf("YES\n");
            else {
                // 1, 2
                if (x6) printf("YES\n"); else printf("NO\n");
            }
        } else {
            if (cs[1]==0&&cs[2]==0) printf("YES\n");
            else if (cs[1]==0) {
                //0, 2
                if (x5) printf("YES\n"); else printf("NO\n");
            } else if (cs[2]==0) {
                //0, 1
                if (x3) printf("YES\n"); else printf("NO\n");
            } else {
                if (x3>1) {
                    if (x5||x6) printf("YES\n"); else printf("NO\n");
                    continue;
                }
                if (x5>1) {
                    if (x3||x6) printf("YES\n"); else printf("NO\n");
                    continue;
                }
                if (x6>1) {
                    if (x3||x5) printf("YES\n"); else printf("NO\n");
                    continue;
                }
                if (x3==0&&x5==0) { printf("NO\n"); continue; }
                if (x3==0&&x6==0) { printf("NO\n"); continue; }
                if (x5==0&&x6==0) { printf("NO\n"); continue; }
                // one link
                if (x7==0) { printf("YES\n"); continue; }
                // 0->1->2
                if (x3&&x6) {
                    if (cs[1]==1) { printf("YES\n"); continue; }
                }
                // 0->2->1
                if (x5&&x6) {
                    if (cs[2]==1) { printf("YES\n"); continue; }
                }
                // 1->0->2
                if (x3&&x5) {
                    if (cs[1]==1) { printf("YES\n"); continue; }
                }
                // 1->2->0
                if (x6&&x5) {
                    if (cs[2]==1) { printf("YES\n"); continue; }
                }
                // 2->0->1
                if (x5&&x3) {
                    if (cs[0]==1) { printf("YES\n"); continue; }
                }
                // 2->1->0
                if (x6&&x3) {
                    if (cs[1]==1) { printf("YES\n"); continue; }
                }
                printf("NO\n");
            }
        }
    }
    return 0;
}