B231123233313231323132233133313233313232233132313231333132333132333132332322121   >>    B23112323331323132313223313331323331323223313231323133313233313233313233232212   <<    B231123233313231323132233133313233313232233132313231333132333132333132332322123   >>      B231123233313231323132233133313233313232233132313231333132333132333132332322122   >>