أرسل هذا في رسالة قصيرة: Symmetry Groups of Two-Way Twofold and Three-Way Threefold Fabrics

  _  _      ___               __   __   _    _   
 | \| ||   / _ \\    ____     \ \\/ // | |  | || 
 |  ' ||  / //\ \\  |    \\    \ ` //  | |/\| || 
 | .  || |  ___  || | [] ||     | ||   |  /\  || 
 |_|\_|| |_||  |_|| |  __//     |_||   |_// \_|| 
 `-` -`  `-`   `-`  |_|`-`      `-`'   `-`   `-` 
                    `-`