import java.util.Scanner;

public class JoinMultipleFirsts $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($

System.in$)$;

String list$1$;

String list$2$;

String list$3$;

String first$0$fList$1$;

String first$0$fList$2$;

String firstOflist$3$;

String allFirsts;

list$1=$ scnr$.$ nextLine $()$ ;

list$2=$ scnr$.$ nextLine$(()$ ;

list$3=$ scnr$.$ nextLine$($