[Python] Creating a character grid from a table; output is inverted

I was given a problem that takes in a table of information (grid coordinates and characters) and asked to place them into a table to make a message.

I've spent time working on some Python to work it out but my answer is coming out upside down and I can't figure out why.

import requests
from bs4 import BeautifulSoup

webpage_response = requests.get('https://docs.google.com/document/d/e/2PACX-1vRMx5YQlZNa3ra8dYYxmv-QIQ3YJe8tbI3kqcuC7lQiZm-CSEznKfN_HYNSpoXcZIV3Y_O3YoUB1ecq/pub')
webpage = webpage_response.content
#print(webpage)

soup = BeautifulSoup(webpage, 'html.parser')
table = soup.find('table')
#print(doc_table)

rows = table.find_all('tr')

data = []
for row in rows[1:]:
cells = row.find_all('td')
character = cells[1].text.strip()
x = cells[0].text.strip()
y = cells[2].text.strip()
data.append((character,x,y))

#print(data)

max_x = max(x for _,x,_ in data)
max_y = max(y for _, _,y in data)
#print(max_x)
#print(max_y)

grid = [[' ' for _ in range(int(max_x) + 1)] for _ in range(int(max_y) + 1)]

for character, x, y in data:
grid[int(y)][int(x)] = character

for row in grid:
print(''.join(row))


This is my code. It should print out a grid of characters that look like a capital F but its upside down. I think the problem arises when I populate the grid but I'm not sure how to fix it.

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