class M{
  static String c(String s){String x="([a-z])(.*?)([a-z])",y="$3$2$1";return s.replaceAll(x,y).replaceAll(x.toUpperCase(),y);}
 
  public static void main(String[] a){
    System.out.println(c("lLEhW OroLd!"));
    System.out.println(c("rpGOZmaimgn uplRzse naC DEoO LdGf"));
    System.out.println(c("eIt uqHKC RBWOO xNf ujPMO SzRE HTL EOvd yAg"));
    System.out.println(c("NraWgCi: Nsas-eNEiTIsev rNsiTG!!"));
    System.out.println(c("(^_^)"));
    System.out.println(c("AWCTY HUOS RETP"));
    System.out.println(c("hwn oeesd acsp nawyya"));
    System.out.println(c("SpMycaeIesKyBorekn"));
    System.out.println(c("D's mroyr, Ivam. I'e faardi I act'n od htta."));
  }
}

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