β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄β΄
β π π π π π π π π π
π π π β
π³π πππππ π πππππ ππππππ