#include <iostream>
#include <algorithm>

int main() {
    int a, b, c;
    std::cin >> a >> b >> c;
    int sides[3] = {a, b, c};
    // 对边长进行排序，确保 sides[0] 和 sides[1] 是较短的两条边，sides[2] 是最长边
    std::sort(sides, sides + 3);

    // 判断是否能构成三角形
    if (sides[0] + sides[1] <= sides[2]) {
        std::cout << "no" << std::endl;
    } else {
        // 计算两条短边的平方和
        int sum_of_squares = sides[0] * sides[0] + sides[1] * sides[1];
        // 计算最长边的平方
        int longest_square = sides[2] * sides[2];

        if (sum_of_squares == longest_square) {
            std::cout << "zhijiao" << std::endl;
        } else if (sum_of_squares < longest_square) {
            std::cout << "dunjiao" << std::endl;
        } else {
            std::cout << "ruijiao" << std::endl;
        }
    }

    return 0;
}
/**************************************************************
	Problem: 1018
	User: linzihang
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2076 kb
****************************************************************/