C3121113331313231323132333131313231323131323223313233313233313232233132231321   >>    C312111333131323132313233313131323132313132322331323331323331323223313223132   <<    C3121113331313231323132333131313231323131323223313233313233313232233132231323   >>      C3121113331313231323132333131313231323131323223313233313233313232233132231322   >>