\2.3-1`2
1(1)
1(2)
1(3)
1(4)
1(5)
1(6)
2(1)
2(2)
2(3)
2(4)
2(5)
2(6)
2(7)
2(8)
2(9)
2(10)
2(11)
2(12)
2(13)
2(14)
2(15)
2(16)
2(17)
2(18)
2(19)