with open("crosswords.in","r") as f_in:

n, m = map(int,f_in.readline().split())

crossword = f_in.read().strip("\n").split("\n")

print(n,m)

print(crossword)

clues = []

clue_count = 0

for x in range(n):

for y in range(m):

if crossword[x][y] == '#':

continue

clue = False

# horizontal clue

if (y == 0 or (y > 0 and crossword[x][y-1] == "#")) and (y < m - 2 and crossword[x][y + 1] == "." and crossword[x][y + 2] == "."):

clue = True

# vertical clue

if (x == 0 or (x > 0 and crossword[x-1][y] == "#")) and (x < n - 2 and crossword[x+1][y] == "." and crossword[x+2][y] == "."):

clue = True

if clue:

clues.append([x + 1, y + 1])

clue_count += 1

with open("crosswords.out","w") as f_out:

f_out.write(str(clue_count)+"\n")

for x in clues:

f_out.write(str(x[0]) + " " + str(x[1]) + "\n")