C1111233131211111211113313331333132313231323223313331313231323233311   >>    C111123313121111121111331333133313231323132322331333131323132323331   <<    C1111233131211111211113313331333132313231323223313331313231323233313   >>      C1111233131211111211113313331333132313231323223313331313231323233312   >>