C1212121231123232233131323223313231333132333132322331323132313231311311   >>    C121212123112323223313132322331323133313233313232233132313231323131131   <<    C1212121231123232233131323223313231333132333132322331323132313231311313   >>      C1212121231123232233131323223313231333132333132322331323132313231311312   >>