C13131221323331323131323132323213231323131323223313233313132211   >>    C1313122132333132313132313232321323132313132322331323331313221   <<    C13131221323331323131323132323213231323131323223313233313132213   >>      C13131221323331323131323132323213231323131323223313233313132212   >>