import std.stdio;

​

void main()

{

    bool[10][20] field;

​

    field[0][4] = true;

    field[1][4] = true;

    field[2][4] = true;

    field[3][4] = true;

​

    void render()

    {

        foreach( row ; field ) {

            foreach( cell ; row ) {

                write( cell ? "#" : "." );

            }

            writeln;

        }

    }

    render();

}