C1212121231123232233131323223313233313231323121133132313232231111   >>    C121212123112323223313132322331323331323132312113313231323223111   <<    C1212121231123232233131323223313233313231323121133132313232231113   >>      C1212121231123232233131323223313233313231323121133132313232231112   >>