Problem J1: Telemarketer or not?

Problem DescriptionCopy Anchor Link

Here at the Concerned Citizens of Commerce (CCC), we have noted that telemarketers like to use seven-digit phone numbers where the last four digits have three properties. Looking just at the last four digits, these properties are:

• the first of these four digits is an 8 or 9;

• the last digit is an 8 or 9;

• the second and third digits are the same.

For example, if the last four digits of the telephone number are 8229, 8338, or 9008, these are telemarketer numbers.

Write a program to decide if a telephone number is a telemarketer number or not, based on the last four digits. If the number is not a telemarketer number, we should answer the phone, and otherwise, we should ignore it.

Input SpecificationCopy Anchor Link

The input will be 4 lines where each line contains exactly one digit in the range from $0$ to $9$.

Output SpecificationCopy Anchor Link

Output either ignore if the number matches the pattern for a telemarketer number; otherwise, output answer.

Sample Input 1Copy Anchor Link

9
6
6
8

Output for Sample Input 1Copy Anchor Link

ignore

Explanation of Output for Sample Input 1Copy Anchor Link

The first digit is $9$, the last digit is $8$, and the second and third digit are both $6$, so this is a telemarketer number.

Sample Input 2Copy Anchor Link

5
6
6
8

Output for Sample Input 2Copy Anchor Link

answer

Explanation of Output for Sample Input 2Copy Anchor Link

The first digit is $5$, and so this is not a telemarketer number.