C1212121231123232233131323223313231323331323222313231323331123221   >>    C121212123112323223313132322331323132333132322231323132333112322   <<    C1212121231123232233131323223313231323331323222313231323331123223   >>      C1212121231123232233131323223313231323331323222313231323331123222   >>