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

void print(int arr[], int n, int index, int level) {
         if (index < n) {
                for (int i = 0; i < level; i++) {
                        printf(" ");
                }
                printf("%d\n", arr[index]);

                int left_index = 2 * index + 1;
                int right_index = 2 * index + 2;

                print(arr, n, left_index, level + 1);
                print(arr, n, right_index, level + 1);
         }
}
int binary (int arr[], int n) {
        for (int i = 0; i < n; i++) {
                int left_index = 2 * i + 1;
                int right_index = 2 * i + 2;

                if (left_index < n && arr[left_index] < arr[i]) {
                return 0;
                }

                if (right_index < n && arr[right_index] < arr[i]) {
                return 0;
                }
        }
        return 1;
}
int main () {
        int arr[100];
        int n = 0;

        while (scanf("%d", &arr[n]) == 1) {
        n++;
        }

        if (binary(arr,n)) {
        printf("Je to taka kopa:\n");
        print(arr, n, 0, 0);

        }else{
        printf("Nie je kopa.\n");
        }

        return 0;
}