C13131221323331323131323132323213231323131323223313233313231323233231211   >>    C1313122132333132313132313232321323132313132322331323331323132323323121   <<    C13131221323331323131323132323213231323131323223313233313231323233231213   >>      C13131221323331323131323132323213231323131323223313233313231323233231212   >>