C21321133133313121211113313331323133313113121111331333132313232233221   >>    C2132113313331312121111331333132313331311312111133133313231323223322   <<    C21321133133313121211113313331323133313113121111331333132313232233223   >>      C21321133133313121211113313331323133313113121111331333132313232233222   >>