from random import randint

H,W=map(int,input().split())
MAP=[list(input().strip()) for i in range(H)]

A=[]

for i in range(H):
    for j in range(W):
        if MAP[i][j]=="*":
            A.append((i,j))

while True:
    x=randint(0,H-1)
    y=randint(0,W-1)

    if MAP[x][y]=="*":
        continue

    if (A[0][1]-A[1][1])*(A[0][0]-x)==(A[0][0]-A[1][0])*(A[0][1]-y):
        continue


    if x==A[0][0]==A[1][0]:
        continue
    if y==A[0][1]==A[1][1]:
        continue

    MAP[x][y]="*"
    break

for i in range(H):
    print("".join(MAP[i]))