// dfmt off
T lread(T=long)(){return readln.chomp.to!T;}T[] lreads(T=long)(long n){return iota(n).map!((_)=>lread!T).array;}
T[] aryread(T=long)(){return readln.split.to!(T[]);}void arywrite(T)(T a){a.map!text.join(' ').writeln;}
void scan(L...)(ref L A){auto l=readln.split;foreach(i,T;L){A[i]=l[i].to!T;}}alias sread=()=>readln.chomp();
void dprint(L...)(lazy L A){debug{auto l=new string[](L.length);static foreach(i,a;A)l[i]=a.text;arywrite(l);}}
static immutable MOD=10^^9+7;alias PQueue(T,alias l="b<a")=BinaryHeap!(Array!T,l);import std, core.bitop;
// dfmt on

void main()
{
    long H, W;
    scan(H, W);
    string[] A = generate(sread).take(H).array;
    auto h = new bool[](H);
    auto w = new bool[](W);
    foreach (y; 0 .. H)
    {
        if (A[y].all!"a == '.'")
            h[y] = true;
    }
    foreach (x; 0 .. W)
    {
        if (iota(H).all!(a => A[a][x] == '.'))
            w[x] = true;
    }
    foreach (y; 0 .. H)
    {
        if (h[y])
            continue;
        foreach (x; 0 .. W)
        {
            if (w[x])
                continue;
            write(A[y][x]);
        }
        writeln();
    }
}
