def funcH(i, j):
    return S[i][j] == "." and i+1 < H and S[i+1][j] == "." and (i == 0 or S[i-1][j] == "#")
def funcW(i, j):
    return S[i][j] == "." and j+1 < W and S[i][j+1] == "." and (j == 0 or S[i][j-1] == "#")

H, W = map(int, input().split())
S = [input() for _ in range(H)]

R = []
C = []
for i in range(H):
    for j in range(W):
        if funcH(i, j) or funcW(i, j):
            cnt = 0
            for k in range(j, W):
                if S[i][k] == "#":
                    break
                cnt += 1
            if 2 <= cnt and funcW(i, j):
                R.append("a"*cnt)
            else:
                R.append("-")
            cnt = 0
            for k in range(i, H):
                if S[k][j] == "#":
                    break
                cnt += 1
            if 2 <= cnt and funcH(i, j):
                C.append("a"*cnt)
            else:
                C.append("-")

print(len(R))
for i in range(len(R)):
    print(R[i], C[i])