C1212121231123232233131323223313231333132322113313231323331323223313121   >>    C121212123112323223313132322331323133313232211331323132333132322331312   <<    C1212121231123232233131323223313231333132322113313231323331323223313123   >>      C1212121231123232233131323223313231333132322113313231323331323223313122   >>