pi groups

UUN	        Group
s1647760	1
s1766404	1
s1527764	1
s1650684	1
s1627728	1
s1526737	1
s1605821	1
s1784529	1
s1891676	1
s1620398	2
s1709221	2
s1232483	2
s1544963	2
s1613637	2
s1639713	2
s1616573	2
s1605989	2
s1613936	3
s1605619	3
s1420263	3
s1633754	3
s1528565	3
s1627255	3
s1660711	3
s1645568	3
s1891077	4
s1603859	4
s1688291	4
s1607499	4
s1610935	4
s1538123	4
s1636459	4
s1641210	4
s1630726	5
s1891132	5
s1636353	5
s1536094	5
s1642212	5
s1688193	5
s1627278	5
s1639828	5
s1512295	6
s1603732	6
s1688208	6
s1610745	6
s1662973	6
s1581377	6
s1654111	6
s1888469	6
s1637451	7
s1614973	7
s1640402	7
s1614842	7
s1651374	7
s1636732	7
s1607754	7
s1877917	7
s1643613	8
s1674417	8
s1621503	8
s1627856	8
s1627291	8
s1629291	8
s1662815	8
s1888708	8
s1784380	9
s1611382	9
s1606617	9
s1634706	9
s1628873	9
s1688197	9
s1660343	9
s1888161	9
s1532662	10
s1787269	10
s1636199	10
s1617028	10
s1632620	10
s1636431	10
s1652610	10
s1887424	10
s1688185	11
s1660656	11
s1620208	11
s1686297	11
s1623062	11
s1738850	11
s1616316	11
s1881358	11
s1615548	12
s1533921	12
s1511619	12
s1764997	12
s1612425	12
s1891076	12
s1613523	12
s1885308	12
s1646368	13
s1652665	13
s1618712	13
s1658173	13
s1603191	13
s1624554	13
s1707651	13
s1887899	13
s1623919	14
s1604556	14
s1607148	14
s1638388	14
s1651792	14
s1630707	14
s1601921	14
s1888323	14
s1611086	15
s1688201	15
s1708793	15
s1637668	15
s1637941	15
s1631442	15
s1705508	15
s1884780	15
s1602340	16
s1653529	16
s1601866	16
s1688207	16
s1630045	16
s1650024	16
s1623165	16
s1883425	16
s1631941	17
s1658030	17
s1607021	17
s1655829	17
s1642131	17
s1528741	17
s1651451	17
s1886255	17
s1647079	18
s1624697	18
s1623893	18
s1632798	18
s1654170	18
s1684168	18
s1655225	18
s1888119	18
s1624686	19
s1548787	19
s1621751	19
s1643102	19
s1663938	19
s1636469	19
s1660124	19
s1884193	19
s1622520	20
s1545545	20
s1617910	20
s1227664	20
s1661865	20
s1634680	20
s1655552	20
s1880831	20