wallpaper = [".#...", "..#..", "...#."]
# wallpaper = ["..........", ".....#....", "......##..", "...##.....", "....#....."]
result = [0, 1, 3, 4]
def solution(wallpaper):
a, b = [], []
for i in range(len(wallpaper)):
for j in range(len(wallpaper[i])):
if wallpaper[i][j] == "#":
a.append(i)
b.append(j)
return [min(a), min(b), max(a) + 1, max(b) + 1]