public static int makingAnagrams(String s1, String s2) {
    Map<String, Long> s1map = Arrays.stream(s1.split("")).collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));
    Map<String, Long> s2map = Arrays.stream(s2.split("")).collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));

    long delcount = 0;

    Set<Entry<String, Long>> s1entryset = s1map.entrySet();
    Iterator<Entry<String, Long>> s1iterator = s1entryset.iterator();
    while(s1iterator.hasNext()) {
        Entry<String, Long> entry = s1iterator.next();

        String s1key = entry.getKey();
        Long s1val = entry.getValue();
        if(s2map.get(s1key) != null) {
            if(s1val > s2map.get(s1key)) delcount += s1val - s2map.get(s1key);
            else if(s2map.get(s1key) > s1val) delcount += s2map.get(s1key) - s1val;
        }
        else if(s2map.get(s1key) == null) {
            delcount += s1val;
        }
    }

    Set<Entry<String, Long>> s2entryset = s2map.entrySet();
    Iterator<Entry<String, Long>> s2iterator = s2entryset.iterator();
    while(s2iterator.hasNext()) {
        Entry<String, Long> entry = s2iterator.next();
        String s2key = entry.getKey();
        Long s2val = entry.getValue();
        if(s1map.get(s2key) == null) {
            delcount += s2val;
        }
    }
    return (int)delcount;
}