n=int(input())
X=[]
Ans=[]
for i in range(n):
    I=[int(c) for c in input()]
    X.append(I)
    Ans.append(["."]*n)

for i in range(n):
    for j in range(n):
        cnt=0
        if i==0 or i==n-1:
            cnt+=1
        if j==0 or j==n-1:
            cnt+=1
        if cnt==1:
            X[i][j]+=3
        elif cnt==2:
            X[i][j]+=5


def c(x,y):
    cnt=0
    for i in range(x-1,x+2):
        for j in range(y-1,y+2):
            if not (0<=i<n and 0<=j<n):
                cnt+=1
            elif Ans[i][j]=="o":
                cnt+=1
    return cnt

for num in reversed(range(18)):
    for i in range(n):
        for j in range(n):
            if X[i][j]==num:
                if c(i,j)<num:
                    Ans[i][j]="o"
for I in Ans:print("".join(I))