x;main(_){
	gets(&_);
	read(0,&x,4);
	puts(
		x==0x00000a30||
		x==0x00000a31||
		x==0x000a3130||
		x==0x000a3031||
		x==0x0a303130||
		x==0x0a313031
		?"NO":"YES"
	);
	return 0;
}