Exactly One Teen Number

Background

Congcong and his friends are playing a number game. They have defined a special category of numbers and want to determine if two given numbers satisfy an interesting condition.

Problem Description

We'll say that a number is "teen" if it is in the range $13$ to $19$ inclusive. Given two integer values, return true if one or the other is teen, but not both.

Input Format

Input is given from standard input in the following format.

a b

Where $a$ and $b$ are two integers.

Output Format

Output is printed to standard output in the following format.

result

Where result is a boolean value (true or false).

Sample

13 99

true

21 19

true

13 13

false

Sample Explanation

For Sample 1: $13$ is a teen number, $99$ is not. Exactly one number is teen, so true is returned. For Sample 2: $21$ is not a teen number, $19$ is. Exactly one number is teen, so true is returned. For Sample 3: $13$ is a teen number, and $13$ is also a teen number. Both numbers are teen, which does not satisfy the "exactly one" condition, so false is returned.

Constraints

Time limit for each test case: $1$ second. Memory limit for each test case: $1024$ KiB.