CCC '18 J1 - Telemarketer or not?

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Points: 3
Time limit: 3.0s
Memory limit: 256M

Problem type
Canadian Computing Competition: 2018 Stage 1, Junior #1

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 or ;
• the last digit is an or ;
• 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 Specification

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

Output Specification

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

Sample Input 1

9
6
6
8

Sample Output 1

ignore

Explanation for Sample Output 1

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

Sample Input 2

5
6
6
8

Sample Output 2

answer

Explanation for Sample Output 2

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