R=range
I=input
N=int(I())
A=[[int(c)for c in I()]for i in R(N)]
T=[[0]*N for i in R(N)]
B=[t[:]for t in T]
def e(i,j):return T[i][j]^(B[i][j]<A[i][j]+T[i][j])
q=[(i,j)for i in R(N)for j in R(N)if e(i,j)]
while q:
	i,j=q.pop()
	if e(i,j):
		for k in R(max(0,i-1),min(N,i+2)):
			for h in R(max(0,j-1),min(N,j+2)):B[k][h]+=1-2*T[i][j];q+=[(k,h)]*e(k,h)
		T[i][j]^=1
for t in T:print(''.join(".o"[c]for c in t))