Most likely scenario:
1. ND
2. OG
3. CD
4. Ledford
Also possible:
1. OG and ND
3. CD and Ledford
Least likely:
1. ND and CD
3. OG and Ledford
1. ND
2. OG
3. CD
4. Ledford
Also possible:
1. OG and ND
3. CD and Ledford
Least likely:
1. ND and CD
3. OG and Ledford