0.5R1,2R5
1-123
1-1,4-2
3-3
2-34,4-4
4-1
3-4
2-1
1-34,4-1
2-3,3-12
1-34,2-3,3-2,4-124
1-2
1-3.2-4
1-3,2-1
1-4