Family Ordering

Special for beginners, ^_^

Problem Description

Someone has a large family whose generational relationships are very tangled. Please help sort them out.

You are given information about each person's children.

Output a sequence such that every person's descendants are listed after that person.

Input Format

Line 1: an integer $N$ ($1\le N\le100$), the number of people in the family.

The next $N$ lines: line $i$ describes the sons of person $i$.

Each line ends with 0 to mark the end of the description.

Output Format

Output a sequence such that every person's descendants are listed after that person.

If multiple solutions exist, output any one.

Sample Input 1

5
0
4 5 1 0
1 0
5 3 0
3 0

Sample Output 1

2 4 5 3 1

Constraints

1s, 1024KiB for each test case.