#!/usr/bin/python

input=open('DATA5.txt','r')
output=open('OUT5.txt','w')
instring=input.read()
question=instring.split('\n\n')
for p in range(len(question)):
	lines=question[p].split('\n')
	W=int(lines[0])
	C=int(lines[1])
	R=int(lines[2])
	i=0
	D=[]
	for line in range(3,R+3):
		D.append(lines[line])
	
	sA=0
	for blah in D:
		sA=sA+blah.count('A')
	
	for k in range(W):
		cr=0
		cc=0
		for blah in range(R-1):
			for j in range(C-1):
				for i in range(R-1):
					if cr+1<R and D[cr+1][cc]!='#' and D[cr+1][cc]!='W':
						cr=cr+1
				if cc+1<C and D[cr][cc+1]!='#' and D[cr][cc+1]!='W':
					cc=cc+1
		D[cr]=D[cr][:cc]+'W'+D[cr][cc+1:]
			
	fA=0
	for blah in D:
		fA=fA+blah.count('A')
	damaged=sA-fA
	output.writelines(str(damaged))
	output.writelines("\n")