N, M = map(int, input().split())
S = [list(input()) for _ in range(N)]

cnt_retsu = [0]*M

for j in range(M):
    cnt = 0
    for i in range(N):
        if S[i][j] == '#':
            cnt += 1
    cnt_retsu[j] = cnt

cnt_retsu.sort(reverse=True)

ans = [['.'] * (M) for _ in range(N)]

for j in range(M):
    # j列
    for i in range(cnt_retsu[j]):
        ans[i][j] = '#'

for a in ans:
    print(''.join(a))