def main():
    h, w = list(map(int, input().split()))
    S = ["#"*(w+2)] + ["#"+input()+"#" for _ in range(h)] + ["#"*(w+2)]
    h += 2
    w += 2
    Ans = []
    for y in range(1, h-1):
        for x in range(1, w-1):
            if S[y-1][x] + S[y][x] + S[y+1][x] == "#..":
                Ans.append((y, x))
            elif S[y][x-1] + S[y][x] + S[y][x+1] == "#..":
                Ans.append((y, x))
    print(len(Ans))
    for y, x in Ans:
        print(y, x)

main()