C13131221323331323131323132323213231323131323223313233313231323221123313131121   >>    C1313122132333132313132313232321323132313132322331323331323132322112331313112   <<    C13131221323331323131323132323213231323131323223313233313231323221123313131123   >>      C13131221323331323131323132323213231323131323223313233313231323221123313131122   >>