C3121113331311331313233313231331123132313232233132313331122112312131   >>    C312111333131133131323331323133112313231323223313231333112211231213   <<    C3121113331311331313233313231331123132313232233132313331122112312133   >>      C3121113331311331313233313231331123132313232233132313331122112312132   >>