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)]
def e(i,j):return T[i][j]^(sum(T[k][h]for k in R(max(0,i-1),min(N,i+2))for h in R(max(0,j-1),min(N,j+2)))<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):T[i][j]^=1;q+=[(k,h)for k in R(max(0,i-1),min(N,i+2))for h in R(max(0,j-1),min(N,j+2))if e(k,h)]
for t in T:print(''.join(".o"[c]for c in t))