C13131221323331323131323132323213231323132321133132313232112323211   >>    C1313122132333132313132313232321323132313232113313231323211232321   <<    C13131221323331323131323132323213231323132321133132313232112323213   >>      C13131221323331323131323132323213231323132321133132313232112323212   >>