C21221212121323223313131323132322331323331323221331123231323311   >>    C2122121212132322331313132313232233132333132322133112323132331   <<    C21221212121323223313131323132322331323331323221331123231323313   >>      C21221212121323223313131323132322331323331323221331123231323312   >>