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private static final String LETTER = "[@+\\p{javaLetter}\\p{javaDigit}]";
private static final String JOINER = "[-.:/'’\\p{M}\\u2032\\u00A0\\u200C\\u200D~]";
private static final Pattern WORD = Pattern.compile(LETTER + "+(" + JOINER + "+"
+ LETTER + "+)*");