C11112331333132311331333132313331323132313232233132313331313233313223311   >>    C1111233133313231133133313231333132313231323223313231333131323331322331   <<    C11112331333132311331333132313331323132313232233132313331313233313223313   >>      C11112331333132311331333132313331323132313232233132313331313233313223312   >>