#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd_skip() while(*rp++>=48)
#define rd() ({long _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define rep3(v,s,e) for(long v=s;v<e;++v)
#define rrep(v,e) for(long v=e;v--;)

char wbuf[1<<25];
int d[100001];

int main(){
	char*mmap();
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	char*wp=wbuf;

	long t=rd();
	for(;t;--t){
		long r=0;
		long n=rd();
		rep3(i,1,n+1){
			d[i]=2;
		}
		rrep(i,n*2-2){
			long a=rd();
			r+=!--d[a];
		}
		if(r*2>n){
			*(int*)wp='\noN';
			wp+=3;
		}else{
			*(int*)wp='\nseY';
			wp+=4;
		}
	}
	write(1,wbuf,wp-wbuf);
	_exit(0);
}