C3121113331313231323132333131313231323131323223313233313233313232113313231211   >>    C312111333131323132313233313131323132313132322331323331323331323211331323121   <<    C3121113331313231323132333131313231323131323223313233313233313232113313231213   >>      C3121113331313231323132333131313231323131323223313233313233313232113313231212   >>