C21321133133313121211113313331323133313231333132213231323223311   >>    C2132113313331312121111331333132313331323133313221323132322331   <<    C21321133133313121211113313331323133313231333132213231323223313   >>      C21321133133313121211113313331323133313231333132213231323223312   >>