Group 1, Field 1
1. t4 — n2
2. t6 — t2
3. t6 — n2
4. t6 — t4
5. n1 — n2
Group 1, Field 2
1. t6 — n1
2. n1 — t4
3. n1 — t2
4. n2 — t2
5. t4 — t2