import Control.Monad
import Data.Maybe
import qualified Data.ByteString.Char8 as BS
import Data.List

readInt = fst . fromJust . BS.readInt
readIntList = map readInt . BS.words
getInt = readInt <$> BS.getLine
getIntList = readIntList <$> BS.getLine

main = do
    [h, w] <- getIntList
    grid <- replicateM h getLine
    let hcompression g = filter (any (== '#')) g
        wcompression g = transpose $ filter (any (== '#')) (transpose g)
    mapM_ putStrLn $ wcompression (hcompression grid)