19
((((((C(BA))((SR)(Q(LM))))P)((FO)(ED)))(H(GI)))((JK)N))
A tha rec
B cen rec
C cen rec
D rec rec
E apt rec
F hau rec
G apt rec
H san rec 
I cmp rec
J tha rec
K tar rec
L apt rec
M alb rec
N rec rec 
O prb rec
P con rec
Q cmp rec
R san rec
S san rec