function myin(){return require("fs").readFileSync("/dev/stdin", "utf8").trim();}
function myout(t){console.log(t);}//standard output
function myerr(t){console.error(t);}//standard error
//[no]param
//0:何もしない  1:数値へ変換  2:半角SPで分割  3:改行で分割  4:半角SPで分割し、数値配列へ
//5:改行で分割し、数値配列へ  6:1文字に分割  7:1文字に分割し、数値配列へ
function myconv(i,no){switch(no){case 0:return i;case 1:return parseInt(i);case 2:return i.split(" ");case 3:return i.split("\n");case 4:return i.split(" ").map((a)=>Number(a));case 5:return i.split("\n").map((a)=>Number(a));case 6:return i.split("");case 7:return i.split("").map((a)=>Number(a));}}
function Main(input) {
  input = myconv(input,3);
  var H = myconv(input[0],4)[0];
  var W = myconv(input[0],4)[1];
  input.shift();
  for(var i = 0; i < H; i++){
    if(input[i].indexOf("#") == -1){
       input.splice(i,1);
      H--;
      i--;
    }
  }
  var checkWidth = new Array(W).fill(0);
  for(var i = 0; i < H; i++){
    var tmp = myconv(input[i],6);
    for(var j = 0; j < W; j++){
      if(tmp[j] == "."){
         checkWidth[j]++;
      }
    }
  }
  for(var i = 0; i < H; i++){
    var tmp = myconv(input[i],6);
    for(var j = 0; j < W; j++){
      if(checkWidth[j] == H){
         tmp[j] = "";
      }
    }
    input[i] = tmp.join("");
  }
  myout(input.join("\n"));
}
Main(myin());