# Divisibility by 11

Very easy

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

Divisibility by $11$ is often stated as follows: add the digits standing separately at even and at odd positions. If the difference of these sums is divisible by $11$, then the number is divisible by $11$. Calculate the product of these sums.

## Input

A positive integer $n$ $(10≤n≤2⋅10_{9})$.

## Output

Print the product of sums of digits at even and at odd positions.

## Examples

Input #1

Answer #1

Input #2

Answer #2

Input #3

Answer #3

Submissions 9K

Acceptance rate 62%