C1111233131211111211113313331333132313231323223313232233132213233311   >>    C111123313121111121111331333133313231323132322331323223313221323331   <<    C1111233131211111211113313331333132313231323223313232233132213233313   >>      C1111233131211111211113313331333132313231323223313232233132213233312   >>