## A Boring Problem

Given two integers and , output the sum of all the common factors of and that are **not** prime.

#### Constraints

For 20% of the points, . These constraints were arbitrarily chosen for a brute force subtask.

For the remaining 80%, .

#### Sample Input 1

`28 14`

#### Sample Output 1

`15`

#### Explanation for Sample 1

Factors of are . Factors of are .

are the common factors, but and are prime numbers so we exclude them.

Adding up the rest, we get .

#### Sample Input 2

`27 36`

#### Sample Output 2

`10`

#### Explanation for Sample 2

Factors of are . Factors of are .

are the common factors, but, is a prime number so we exclude it.

Adding up the rest, we get .

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