expand 1.2
rel 5.5 14
mark 1 @
mark 2 y-3#1
mark 3 x8#1
mark 4 x8#2
mark 5 x4#1
mark 6 x4#2
mark 11 y-0.05#1
mark 13 y-0.05#3
mark 21 y-0.1#1
mark 23 y-0.1#3
mark 9 x-2.5y-5#1
mark 10 x.3y-1.5#5
gluon #5 #6
gluon #2 #6
gluon #6 #4
lweight 3
fermion #1 #5
fermion #5 #3
lweight 1
rel #9
label (a) Example of flavour excitation graph
rel #10 
label q
! 
rel 1.5 7
mark 1 @
mark 40 @
mark 2 y-4#1
mark 3 x4#1
mark 4 x4y-2#1
mark 5 x4y-4#1
mark 6 x2y-2#1
mark 7 x2y-4#1
mark 8 x2#1
mark 9 x-1.5y-5.5#1
rel #9
label (b) Graphs containing spin-one exchange in the t-channel
gluon #1 #8
gluon #2 #7
gluon #7 #5
gluon #7 #6
lweight 3
fermion #4 #6
fermion #6 #8
fermion #8 #3
lweight 1
! 
mark 1 x6#1
mark 2 y-4#1
mark 3 x4#1
mark 4 x4y-2#1
mark 5 x4y-4#1
mark 6 x2y-2#1
mark 7 x2y-4#1
mark 8 x2#1
mark 9 x0.9y0.9#6
mark 10 x1.1y1.1#6
gluon #1 #8
gluon #2 #7
gluon #7 #5
gluon #7 #6
lweight 3
fermion #10 #3
fermion #6 #9
fermion #8 #6
fermion #4 #8
lweight 1
! 
mark 1 x6#1
mark 2 y-4#1
mark 3 x5#1
mark 4 x5y-4#1
mark 5 x5y-2#1
mark 6 x3y-1#1
mark 7 x2y-4#1
mark 8 x2y-1#1
gluon #1 #8
gluon #2 #7
gluon #7 #4
gluon #8 #6
gluon #7 #8
lweight 3
fermion #5 #6
fermion #6 #3
lweight 1
mark 1 y-0.5#40
rel  #1
label p\d1
mark 2 y-3.3#40
rel  #2
label p\d2
mark 3 x2.4y-3#40
rel #3
label q