C1111233131211111211113313331333133313231323331311331322233232321   >>    C111123313121111121111331333133313331323132333131133132223323232   <<    C1111233131211111211113313331333133313231323331311331322233232323   >>      C1111233131211111211113313331333133313231323331311331322233232322   >>