Filename:SINK-CP
If T=0 And U=1
Then 21->T
T->P
Return
IfEnd
If T=21 And U=1
Then 0->T
T->P
Return
IfEnd
If T=0 And U=0
Then 21->T
Return
IfEnd
If T=21 And U=0
Then 0->T
Return
IfEnd