regex-pattern-to-check-if-string-has-all-characters

Regex pattern to check if string has all characters

Your function should return a valid regular expression. This is a pattern which is normally used to match parts of a string.In this case will be used to check if all the characters given in the input appear in a string.

Input

Non empty string of unique alphabet characters upper and lower case.

Output

Regular expression pattern string.

Examples

Your function should return a string.

public static String regexContainsAll(str) {
  return "abc";
}

That regex pattern will be tested like this.

String abc = "abc";
String pattern = regexContainsAll(abc);
String str = "zzzaaacccbbbzzz";
Pattern.compile(pattern).matcher(str).find();  // -> true