C131312213233313231313231323232132313231313232233132333132322121311   >>    C13131221323331323131323132323213231323131323223313233313232212131   <<    C131312213233313231313231323232132313231313232233132333132322121313   >>      C131312213233313231313231323232132313231313232233132333132322121312   >>