C13131221323331323131323132323213231323131323223313233313231322121121   >>    C1313122132333132313132313232321323132313132322331323331323132212112   <<    C13131221323331323131323132323213231323131323223313233313231322121123   >>      C13131221323331323131323132323213231323131323223313233313231322121122   >>