import sys
L = list(map(lambda s: [9]+list(map(int, s))+[9] ,sys.stdin.read().splitlines()))
W = len(L[0])
L = [[9]*W] + L + [[9]*W]
H = len(L)
def printgrid():
	for row in L:
		print("".join(map(str,row)))
def neigh(x,y,C=0,V=set()):
	p = L[x][y]
	if p<9:
		V.add((x,y))
		C+=1
		#print(' '*C, x,y,"p="+str(p), C)
		for (i,j) in [(0,1),(1,0),(-1,0),(0,-1)]:
			if L[x+i][y+j]>p and (x+i,y+j) not in V:
				C=neigh(x+i,y+j,C,V)
		return C
	else:
		#print(' '*C, x,y,"p="+str(p), C)
		return C
printgrid()
S = []
for x in range(1,H-1):
	for y in range(1,W-1):
		p = L[x][y]
		n = L[x-1][y]
		s = L[x+1][y]
		e = L[x][y-1]
		w = L[x][y+1]
		islow =all([p<n,p<s,p<e,p<w])
		#print(x,y,p,n,s,e,w)
		if islow:
			print(x,y,p, "is low")
			S.append(neigh(x,y))
print(S)
S = sorted(S)
print(S[-1]*S[-2]*S[-3])