${\color{#D61F06}{12345678\dots 99999999100000000}} \\ \ \\ {\color{#3D99F6}{1, 2, 3, 4, 5, 6, 7, 8, \dots, 9999999999, 10000000000}}$

$A$ : The number of digits colored red.

$B$ : The number of 0s colored blue.

Which is bigger, $A$ or $B$ ?

**
Note
**
: Write down the concatenate the positive integers in increasing sequence untill
$10^8$
colored red.
Write down the positive integers in increasing sequence until
$10^9$
colored blue.

$A>B$
$A=B$
$A<B$

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