C21321133133313121211113313331323133313232313231323133313232211321   >>    C2132113313331312121111331333132313331323231323132313331323221132   <<    C21321133133313121211113313331323133313232313231323133313232211323   >>      C21321133133313121211113313331323133313232313231323133313232211322   >>