C131312213233313231313231323232132313231313232233132333132321121121   >>    C13131221323331323131323132323213231323131323223313233313232112112   <<    C131312213233313231313231323232132313231313232233132333132321121123   >>      C131312213233313231313231323232132313231313232233132333132321121122   >>