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

typedef unsigned long ulong;
char wbuf[1<<25];

int main(){
	char*mmap();
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	char*wp=wbuf;
	rd_skip_line();
	while(*rp){
		ulong z='\nseY';
		long n=rd();
		long m=rd();
		long b=rd();
		rrep(i,n-1){
			long a=rd();
			if(a+b<m){
				rd_skip_line();
				z='\n oN';
				break;
			}
			b=a;
		}
		*(ulong*)wp=z;
		wp+=4;
	}
	write(1,wbuf,wp-wbuf);
	_exit(0);
}