Tontti

h, w, n = [int(i) for i in raw_input().split()]
rows = []

qq = []

def solve(pos,size):
    if size == 1:
        return int(n==1 and rows[pos[1]][pos[0]])
    cs = 0
    # fx = 0
    # fy = 0
    # lx = 0
    # ly = 0
    for x in range(size):
        for y in range(size):
            if (rows[pos[1]+y][pos[0]+x]):
                cs += 1
                # if x == 0:
                #     fx += 1
                # if y == 0:
                #     fy += 1
                # if x == size-1:
                #     lx += 1
                # if y == size-1:
                #     ly += 1
    if cs < n or size*size < n:
        return 0
    else:
        s = int(cs==n)
        for x in [0,1]:
            for y in [0,1]:
                if [[pos[0]+x, pos[1]+y], size-1] in qq:
                    continue
                r = solve((pos[0]+x, pos[1]+y), size-1)
                if r:
                    qq.append([[pos[0]+x, pos[1]+y], size-1])
                s += r
        return s


for y in range(h):
    q = raw_input()
    rows.append([])
    for x in range(w):
        rows[-1].append((q[x] == "*"))

if n==0:
    print 0
else:
    s = 0
    if h == w:
        s = solve((0,0), h)
    elif w < h:
        for i in range(h-w+1):
            s += solve((0,i), w)
    else:
        for i in range(w-h+1):
            s += solve((i,0), h)
    print s



"""
..**..
**....
*...*.
..*...


**
*.

**.
...
..*

.**
*..
...
"""

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 2

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED