#include<stdio.h>
int main()
{
    int m,n,t,s;
    scanf("%d%d%d",&m,&n,&t);
   
    s=t+m+n;
    if(s>=270)
        printf("beijing");
    else
        printf("nanjing");
    return 0;
}
/**************************************************************
	Problem: 1626
	User: admin
	Language: C
	Result: Accepted
	Time:13 ms
	Memory:1144 kb
****************************************************************/