F
i
n
d
I
n
s
t
a
n
c
e
[
1
1
1
1
*
a
-
1
1
1
*
b
+
1
1
*
c
-
d
8
7
6
5
&
&
0
<
a
<
1
0
&
&
0
<
b
<
1
0
&
&
0
<
c
<
1
0
&
&
0
<
d
<
1
0
,
{
a
,
b
,
c
,
d
}
,
I
n
t
e
g
e
r
s
]
{
}