#include<stdio.h>
int main()
{
    int m,n,t;
    scanf("%d%d%d",&m,&n,&t);
    if(m>=90||n>=90||t>=90)
        printf("beijing");
    else
        printf("nanjing");
    return 0;
}

/**************************************************************
	Problem: 1627
	User: admin
	Language: C
	Result: Accepted
	Time:17 ms
	Memory:1144 kb
****************************************************************/