Problem 2: Sorting Rows of Numbers,
*(K Narayan Kumar, CMI)*

You will be given several lines of input where each line
contains a sequence of positive integers. Your task is to sort
these lines in *lexicographic* order. Lexicographic order is
the order in which words are listed in the dictionary. The ordering
is determined by the left most element (in this case the left most
integer on each line) and if the left most elements are equal then
by the second element from the left, if the left most and the
second element from the left are equal then by the third element
from the left and so on.

For example, when the lines

14 38 11 89 27 34 27 12 34 27 92 2 3 1 17 2

are sorted in the lexicographic order we get

14 38 11 89 17 2 27 27 12 34 27 34 92 2 3 1

Input format

The first line of the input contains a single integer *N*
indicating the number of lines of input. This is followed by
*N* lines (lines 2 through *N*+1) each which consists
of a sequence of positive integers followed by a single -1. (The -1
is there just as an end marker and is not to be used in the
sorting). Every line contains at the most 50 numbers.

Output format

*N* lines each containing a sequence of integers. These
*N* lines must be the lexicographically sorted presentation
of the *N* input lines.

Test data

You may assume that *N* ≤ 1000. (Recall that there are at
the most 50 integers on each line).

Example

We now illustrate the input and output formats using the above example:

Sample input:

6 14 38 11 89 -1 27 34 -1 27 12 34 -1 27 -1 92 2 3 1 -1 17 2 -1

Sample output:

14 38 11 89 17 2 27 27 12 34 27 34 92 2 3 1

CPU Timelimit: | 3 seconds |

Memory limit: | 64M |

Grading style: | ioi |