#/usr/bin/env python

grid = []

def check_scenic(grid, x, y):
    v = grid[x][y]
    # check up
    s_up = 0
    for i in reversed(range(x)):
        s_up += 1
        if grid[i][y] >= v:
            break
    # check down
    s_down = 0
    for i in range(x+1, len(grid)):
        s_down += 1
        if grid[i][y] >= v:
            break
    # check left
    s_left = 0
    for i in reversed(range(y)):
        s_left += 1
        if grid[x][i] >= v:
            break
    # check right
    s_right = 0
    for i in range(y+1, len(grid[0])):
        s_right += 1
        if grid[x][i] >= v:
            break
        
    return s_up * s_down * s_right * s_left

with open("input.txt", "r") as f:
    for line in f:
        grid.append([int(c) for c in line.strip()])

scenic_score = []
for x in range(0, len(grid)):
    for y in range(0, len(grid[0])):
        scenic_score.append(check_scenic(grid, x, y))

print(max(scenic_score))