Harvest Grid Balance Points

A community orchard is arranged as a rectangular grid of R rows and C columns of plots, and every plot has a recorded yield (in kilograms) for the current growing season. A plot's yield is called a balance point if it is the smallest yield anywhere in its own row and, at the same time, the largest yield anywhere in its own column. Given the yield of every plot, report the yield of every balance point.

Input format

• Line 1: two integers R and C, the number of rows and columns.
• Each of the next R lines contains C integers: the yields of that row's plots, left to right.

Output format

Print one line containing the yield of every balance point, one number per qualifying plot, in non-decreasing order, separated by single spaces. If a value ties as the minimum of its row (or the maximum of its column) at more than one position, each qualifying plot still contributes its own entry to the output, so the same value can legitimately appear more than once. If no plot is a balance point, print an empty line.

Constraints

• 1 <= R, C <= 500
• 1 <= yield <= 100000 for every plot

3 3
30 10 40
90 50 95
25 20 60

50

2 2
1 2
2 1

(empty)