C21321133133313121211113313331323133313231333132233132322123232311   >>    C2132113313331312121111331333132313331323133313223313232212323231   <<    C21321133133313121211113313331323133313231333132233132322123232313   >>      C21321133133313121211113313331323133313231333132233132322123232312   >>