;LOIDJSEFPOAWHJEPFHJAPWFERT https://QIVfNtq6W25T3UQ0WPX.gif 小游戏

#include<iostream>
#include<ctime>
#include<cstdlib>
using namespace std;
int main(){
	int b;
	char a;
	srand((unsigned)time(NULL));
	while(1){
		cin>>a;
		b=rand()%101;
		if(a='在oiclass中UID为9400的人是不是扇贝？')cout<<"yes"<<endl;
		else{
			if(b<=50)cout<<"yes"<<endl;
			if(b>50)cout<<"no"<<endl;
		}
		
	}
	return 0;
}