Number
F1
F2
F3
F4
1
b
a
b
d
2
b
d
b
c
3
b
c
d
d
4
a
b
d
b
5
a
d
c
d
6
c
b
a
c
7
c
c
b
b
8
c
d
d
a
9
b
b
c
c
10
d
c
d
c
11
d
b
a
a
12
d
d
c
b
13
a
c
a
d
14
d
a
a
b
15
c
a
c
a
16
a
a
b
a
17
b
c
a
a
18
d
b
b
d
19
a
a
d
c
20
b
c
c
b
21
c
d
a
d
Table 1: Liane's set of experiments.
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