import core.bitop, std.algorithm, std.ascii, std.bigint, std.conv, std.math,
    std.functional, std.numeric, std.range, std.stdio, std.string, std.random,
    std.typecons, std.container, std.format;

// dfmt off
T lread(T = long)(){return readln.chomp.to!T();}
T[] lreads(T = long)(long n){return generate(()=>readln.chomp.to!T()).take(n).array();}
T[] aryread(T = long)(){return readln.split.to!(T[])();}
void scan(TList...)(ref TList Args){auto line = readln.split();
foreach (i, T; TList){T val = line[i].to!(T);Args[i] = val;}}
alias sread = () => readln.chomp();enum MOD = 10 ^^ 9 + 7;
alias PQueue(T, alias less = "a<b") = BinaryHeap!(Array!T, less);
// dfmt on

void main()
{
    long H, W;
    scan(H, W);
    auto A = new string[](H);
    foreach (i; 0 .. H)
        A[i] = sread();
    string[] B;
    foreach (i; 0 .. H)
        if (A[i].any!"a == '#'")
        {
            B ~= A[i];
        }
    auto C = new string[](B.length);
    foreach (i; 0 .. W)
    {
        bool b;
        foreach (j; 0 .. B.length)
            if (B[j][i] == '#')
            {
                b = true;
                break;
            }
        if (b)
            foreach (j; 0 .. B.length)
            {
                C[j] ~= B[j][i];
            }
    }
    foreach (c; C)
        writeln(c);
}
