import java.util.*;

public class A {

private static final Set<String> SEPARATORS =

Collections.unmodifiableSet(

new HashSet<>(Arrays.asList("\t", "\n", ";")));

public static void sink(String s) { }

private void checkSeparator(String separator) {

if (SEPARATORS.contains(separator)) {

sink(separator);

}

}

public static final String URI1 = "yarn.io/gpu";

public static final String URI2 = "yarn.io/fpga";

public static final Set<String> SCHEMAS = Set.of(URI1, URI2, "s3a", "wasb");

private void checkSchema(String schema) {

if (SCHEMAS.contains(schema)) {

sink(schema);

}

}

private void testAdd(String inp) {

Set<String> s = new HashSet<>();

s.add("AA");

s.add("BB");

if (s.contains(inp.toUpperCase())) {

sink(inp);

}

}

}