import java.util.*; public class Transform { public String trans(String s, int n) { StringBuilder str=new StringBuilder(); String[] arr=s.split(" "); if (s.lastIndexOf(" ")==s.length()-1) { str.append(" "); } for (int i = arr.length-1; i >=0 ; i--) { for (int j = 0; j < arr[i].length(); j++) { String c=arr[i].charAt(j)+""; if (Character.isLowerCase(arr[i].charAt(j))) { str.append(c.toUpperCase()); }else { str.append(c.toLowerCase()); } } if (i!=0) { str.append(" "); } } return str.toString(); } }