#include <stdio.h>

int main() {
    int a, b, c;

    scanf("%d %d %d", &a, &b, &c);

    if (a > b) { int temp = a; a = b; b = temp; }
    if (a > c) { int temp = a; a = c; c = temp; }
    if (b > c) { int temp = b; b = c; c = temp; }

    if (a + b > c) {
        int a_sq = a * a;
        int b_sq = b * b;
        int c_sq = c * c;

        if (a_sq + b_sq == c_sq) {
            printf("zhijiao\n");
        } else if (a_sq + b_sq < c_sq) {
            printf("dunjiao\n");
        } else {
            printf("ruijiao\n");
        }
    } else {
        printf("no\n");
    }
    return 0;
}
/**************************************************************
	Problem: 1018
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:21 ms
	Memory:1144 kb
****************************************************************/