Problem: You are given n arrays a_1, a_2, ..., a_n; each array consists of exactly m integers. We denote the y-th element of the x-th array as a_{x, y}.

You have to choose two arrays a_i and a_j (1 ≤ i, j ≤ n, it is possible that i = j). After that, you will obtain a new array b consisting of m integers, such that for every k ∈ [1, m] b_k = max(a_{i, k}, a_{j, k}).

Your goal is to choose i and j so that the value of min _{k = 1}^{m} b_k is maximum possible.

Input

The first line contains two integers n and m (1 ≤ n ≤ 3 ⋅ 10^5, 1 ≤ m ≤ 8) — the number of arrays and the number of elements in each array, respectively.

Then n lines follow, the x-th line contains the array a_x represented by m integers a_{x, 1}, a_{x, 2}, ..., a_{x, m} (0 ≤ a_{x, y} ≤ 10^9).

Output

Print two integers i and j (1 ≤ i, j ≤ n, it is possible that i = j) — the indices of the two arrays you have to choose so that the value of min _{k = 1}^{m} b_k is maximum possible. If there are multiple answers, print any of them.

Example

Input


6 5
5 0 3 1 2
1 8 9 1 3
1 2 3 4 5
9 1 0 3 7
2 3 0 6 3
6 4 1 7 0


Output


1 5

Solution (in PYTHON3):

Solution:
import sys
from collections import defaultdict
 
reader = (map(int, line.split()) for line in sys.stdin)
input = reader.__next__
 
n, m = input()
# n, m = 3 * 10 ** 5, 8
vals = set()
locs = defaultdict(list)
for i in range(n):
    for pos, v in enumerate(input()):
        vals.add(v)
        locs[v].append((pos, i))
 
masks = [0] * n
full = (1<<m) - 1
met = {0:0}
for v in sorted(vals, reverse=True):
    for pos, i in locs[v]:
        curr_mask = masks[i] = masks[i] | (1<<pos)
        met[curr_mask] = i
        complement = full ^ curr_mask
        if complement in met:
            print(i+1, met[complement]+1)
            sys.exit()