C13131221323331323131323132323213231323132321133132313232113313232212311   >>    C1313122132333132313132313232321323132313232113313231323211331323221231   <<    C13131221323331323131323132323213231323132321133132313232113313232212313   >>      C13131221323331323131323132323213231323132321133132313232113313232212312   >>