ABC 107-B

#include <bits/stdc++.h>
#define rep(i,n) for (int i=0; i<n; i++)
typedef long long ll;
using namespace std;

int main() {
    int H, W; cin >> H >> W;
    char S[101][101];
    int A[101];//行
    int B[101];//列
    rep(i,101){
        A[i] = 0;
        B[i] = 0;
    }
    rep(i,H){
        rep(j,W){
            cin >> S[i][j];
            if (S[i][j] == '#') {
                A[i] = 1;
                B[j] = 1;
            }
        }
    }
    rep(i,H){
        if (A[i]) {
            rep(j,W){
                if (B[j]) cout << S[i][j];
            }
            cout << endl;
        }
    }
    return 0;
}