S
h
o
w
:
t
h
e
t
r
i
g
r
a
m
c
l
o
c
k
r
e
d
u
c
t
i
o
n
s
e
q
u
e
n
c
e
p
3
q
3
3
,
3
(
)
≃
ℳ
8
(
)