n = input().split()
x = int(n[0])
y = int(n[1])
z = int(n[2])
su = x + y + z
if su / 3 >= 90:
    print('beijing')
else:
    print('nanjing')

/**************************************************************
	Problem: 1626
	User: admin
	Language: Python
	Result: Accepted
	Time:95 ms
	Memory:34480 kb
****************************************************************/