a,b,c=map(int,input().split())
if a+b<=c or a+c<=b or b+c<=a:
    print('no')
if a+b>c and a+c>b and b+c>a:
    if a*a+b*b==c*c or a*a+c*c==b*b or b*b+c*c==a*a:
        print('zhijiao')
        
    elif a*a+b*b>c*c and a*a+c*c>b*b and b*b+c*c>a*a:
        print('ruijiao')

    elif a*a+b*b<c*c or a*a+c*c<b*b or b*b+c*c<a*a:
        print('dunjiao')
/**************************************************************
	Problem: 1018
	User: admin
	Language: Python
	Result: Accepted
	Time:188 ms
	Memory:34480 kb
****************************************************************/