Constellation

2000ms

262144K

Description:

A star map in Berland is a checked field n × m squares. In each square there is or there is not a star. The favourite constellation of all Berland's astronomers is the constellation of the Cross. This constellation can be formed by any 5 stars so, that for some integer x (radius of the constellation) the following is true:

the 2nd is on the same vertical line as the 1st, but x squares up
the 3rd is on the same vertical line as the 1st, but x squares down
the 4th is on the same horizontal line as the 1st, but x squares left
the 5th is on the same horizontal line as the 1st, but x squares right

Such constellations can be very numerous, that's why they are numbered with integers from 1 on the following principle: when two constellations are compared, the one with a smaller radius gets a smaller index; if their radii are equal — the one, whose central star if higher than the central star of the other one; if their central stars are at the same level — the one, whose central star is to the left of the central star of the other one.

Your task is to find the constellation with index k by the given Berland's star map.

Input:

The first line contains three integers n, m and k (1 ≤ n, m ≤ 300, 1 ≤ k ≤ 3·10⁷) — height and width of the map and index of the required constellation respectively. The upper-left corner has coordinates (1, 1), and the lower-right — (n, m). Then there follow n lines, m characters each — description of the map. j-th character in i-th line is «*», if there is a star in the corresponding square, and «.» if this square is empty.

Output:

If the number of the constellations is less than k, output -1. Otherwise output 5 lines, two integers each — coordinates of the required constellation. Output the stars in the following order: central, upper, lower, left, right.

Sample Input:

5 6 1
....*.
...***
....*.
..*...
.***..

Sample Output:

Sample Input:

5 6 2
....*.
...***
....*.
..*...
.***..

Sample Output:

-1

Sample Input:

7 7 2
...*...
.......
...*...
*.***.*
...*...
.......
...*...

Sample Output:

Informação

Provedor Codeforces

Código CF32D