class Solution {
    public String reverseWords(String s) {
        Deque<String> stack = new ArrayDeque<>(0);
        String[] split = s.split(" ");
        for (String item : split) {
            stack.push(item);
        }

        StringBuilder stringBuilder = new StringBuilder();
        while(!stack.isEmpty()) {
            String pop = stack.pop();
            stringBuilder.append(pop).append(" ");
        }
        return stringBuilder.substring(0, stringBuilder.length() - 1);
    }

}