C111123313331323113313331333133313331323132333133313331311221123133313232212321   >>    C11112331333132311331333133313331333132313233313331333131122112313331323221232   <<    C111123313331323113313331333133313331323132333133313331311221123133313232212323   >>      C111123313331323113313331333133313331323132333133313331311221123133313232212322   >>