Payment:  None 
H Version:
D Version:
Currently at root
Q from H
0 H
D
Notes:
H
H
D
3
Payment:   
Notes:
H
H
D
5
Payment:   
Notes:
H
H
D
17
Payment:   
Notes:
H
H
D
18
Payment:   
Notes:
D
H
D
2
Payment:   
Notes:
D
H
D
4
Payment:   
Notes:
D
H
D
16
Payment:   
Notes:
CX of H's argument
D
H
CX of D's argument
D
H
D
H