// "Fix all 'Redundant usage of unmodifiable collection wrappers' problems in file" "true"

import java.util.*;

class Main {

  public static void main(String[] args) {
    Collections unmodifiableCollection = Collections.emptyList();

    List unmodifiableList = Collections.emptyList();
    Set unmodifiableSet = Collections.emptySet();
    Map unmodifiableMap = Collections.emptyMap();

    SortedSet unmodifiableSortedSet = Collections.emptySet();
    SortedMap unmodifiableSortedMap = Collections.emptyMap();

    NavigableSet unmodifiableNavigableSet = Collections.emptySet();
    NavigableMap unmodifiableNavigableMap = Collections.emptyMap();
  }
}