Maskify the String

Given a string s, your task is to mask all characters except the last four characters. In other words, if |s| > 4, replace the first |s| - 4 characters with the '#' symbol and keep the last four characters unchanged. If |s| ≤ 4, simply return the string as-is.

For example, if s = "4556364607935616", the output should be "############5616".

You need to read the input from standard input (stdin) and output the result to standard output (stdout).

inputFormat

The input consists of a single line containing the string s. The string may contain numbers, letters, and special characters. If s has a length of at most 4, output it unchanged.

Note: For mathematical notation, if |s| denotes the length of the string, then the replacement should be applied only if |s| > 4.

outputFormat

Output the masked version of the input string on a single line. If the length of the string is greater than 4, all characters except the last four should be replaced with the '#' symbol. Otherwise, output the string unchanged.

4556364607935616

############5616