#include <stdio.h>
#include <stdlib.h>

int main(void)
{
	int *n;
	n = malloc(sizeof(int));
	int i = 0;
	while (1) {
		scanf("%d", &n[i]);
		if (n[i] == 0) break;
		i++;
		n = realloc(n, sizeof(int)*(i + 1));
	}
	for (int j = 0; j < i; j++) {
		switch (n[j]) {
		case 3:
			printf("k\n");
			break;
		case 4:
			printf("i\n");
			break;
		case 7:
			printf("d\n");
			break;
		case 8:
			printf("e\n");
			break;
		}
	}
	free(n);
	return 0;
}