Valid PIN Checker

You are given a string representing a PIN. A valid PIN must satisfy the following conditions:

• It consists only of numeric digits (0–9).
• Its length is exactly 4 or exactly 6.

Your task is to write a program that reads a PIN from standard input and determines whether it is valid. If the PIN is valid, the program should output True; otherwise, it should output False.

Note: The input is provided via standard input (stdin) and the output should be printed to standard output (stdout).

Examples:

• Input: "1234" → Output: True
• Input: "123456" → Output: True
• Input: "123" → Output: False
• Input: "12345a" → Output: False

inputFormat

The input consists of a single line containing the PIN as a string. The string may include leading or trailing spaces which should be considered as part of the PIN.

outputFormat

The output is a single line: True if the PIN is valid according to the criteria, or False if it is not.

1234

True