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N
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m
b
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o
r
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p
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B
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N
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b
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O
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B
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m
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I
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P
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N
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C
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N
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w
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O
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1
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P
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N
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1
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C
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t
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c
t
n
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m
b
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s
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1
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N
u
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b
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s
,
w
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d
s
a
n
d
s
y
m
b
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1
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5
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O
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P
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N
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C
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c
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1
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I
d
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t
i
f
y
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d
d
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d
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v
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n
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b
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N
u
m
b
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s
,
w
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r
d
s
a
n
d
s
y
m
b
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l
s
(
5
0
0
0
0
t
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9
0
0
0
0
)
O
r
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n
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b
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5
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9
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P
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5
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9
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C
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c
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5
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9
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P
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p
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f
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n
n
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b
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s
E
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p
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t
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x
p
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I
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t
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f
t
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d
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g
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s
i
n
n
u
m
b
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s
(
I
n
v
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s
t
i
g
a
t
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n
)
C
o
m
p
a
r
e
n
u
m
b
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r
s
(
t
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1
0
0
0
0
)
C
o
m
p
a
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n
u
m
b
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s
(
1
0
0
0
0
t
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9
0
0
0
0
)
R
o
u
n
d
n
u
m
b
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r
s
(
t
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1
0
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s
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r
1
0
0
'
s
)
M
a
k
i
n
g
N
u
m
b
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r
s
w
i
t
h
N
u
m
b
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C
a
r
d
s
(
I
n
v
e
s
t
i
g
a
t
i
o
n
)
N
u
m
b
e
r
s
,
w
o
r
d
s
a
n
d
s
y
m
b
o
l
s
(
9
0
0
0
0
t
o
9
0
0
0
0
0
)
N
u
m
b
e
r
s
,
w
o
r
d
s
a
n
d
s
y
m
b
o
l
s
(
m
i
l
l
i
o
n
s
)
O
r
d
e
r
i
n
g
n
u
m
b
e
r
s
(
9
0
0
0
0
t
o
m
i
l
l
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o
n
)
P
a
r
t
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t
i
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n
n
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m
b
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s
(
9
0
0
0
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t
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m
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l
l
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n
)
C
o
n
s
t
r
u
c
t
n
u
m
b
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r
s
(
9
0
0
0
0
t
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m
i
l
l
i
o
n
s
)
C
o
m
p
a
r
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n
u
m
b
e
r
s
(
9
0
0
0
0
t
o
m
i
l
l
i
o
n
s
)
R
o
u
n
d
n
u
m
b
e
r
s
(
t
o
1
0
0
0
'
s
)
R
o
u
n
d
l
a
r
g
e
n
u
m
b
e
r
s
L
e
a
d
i
n
g
d
i
g
i
t
e
s
t
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m
a
t
i
o
n
P
u
z
z
l
e
u
s
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n
g
p
l
a
c
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v
a
l
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o
f
n
u
m
b
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r
s
i
n
t
h
e
m
i
l
l
i
o
n
s
(
I
n
v
e
s
t
i
g
a
t
i
o
n
)
N
u
m
b
e
r
s
,
w
o
r
d
s
a
n
d
s
y
m
b
o
l
s
(
i
n
b
i
l
l
i
o
n
s
)
Lesson
Practice
O
r
d
e
r
n
u
m
b
e
r
s
(
i
n
b
i
l
l
i
o
n
s
)
P
a
r
t
i
t
i
o
n
n
u
m
b
e
r
s
(
b
i
l
l
i
o
n
s
)
C
o
n
s
t
r
u
c
t
n
u
m
b
e
r
s
(
b
i
l
l
i
o
n
s
)
E
x
p
a
n
d
e
d
n
o
t
a
t
i
o
n
a
s
p
o
w
e
r
s
o
f
1
0
C
o
m
p
a
r
e
n
u
m
b
e
r
s
(
b
i
l
l
i
o
n
s
)
E
s
t
i
m
a
t
i
n
g
O
b
j
e
c
t
s
(
I
n
v
e
s
t
i
g
a
t
i
o
n
)
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United Kingdom
Primary
Numbers, words and symbols (in billions)
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