// "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.unmodifiableCollecti<caret>on(Collections.emptyList());

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

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

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