C1212121231123232233131323223313231333132322113313231333131232311   >>    C121212123112323223313132322331323133313232211331323133313123231   <<    C1212121231123232233131323223313231333132322113313231333131232313   >>      C1212121231123232233131323223313231333132322113313231333131232312   >>