C3121113331313231323132333131313231323131323223313233313233313232233131112121   >>    C312111333131323132313233313131323132313132322331323331323331323223313111212   <<    C3121113331313231323132333131313231323131323223313233313233313232233131112123   >>      C3121113331313231323132333131313231323131323223313233313233313232233131112122   >>