s
q
u
a
r
e
r
o
o
t
o
f
:
7
s
t
e
p
s
9
6
7
1
0
.
1
0
1
0
0
1
0
1
0
1
0
0
1
1
1
1
1
1
1
1
0
1
0
1
0
0
1
1
1
0
1
0
0
1
0
1
1
1
1
1
0
0
0
1
1
1
0
1
0
0
1
1
0
1
1
0
1
1
1
1
0
0
1
0
0
2
r
s
=
d
i
g
i
t
s
e
q
u
e
n
c
e
o
f
n