C21221212121211331313232233131333133112212323132313231313232212331   >>    C2122121212121133131323223313133313311221232313231323131323221233   <<    C21221212121211331313232233131333133112212323132313231313232212333   >>      C21221212121211331313232233131333133112212323132313231313232212332   >>