import java.util.Scanner;
public class Jordan {
static Scanner input = new Scanner(System.in);
public static void main(String [] args){
char [] a = new char [6];
for (int c = 0 ; c < a.length;c++) {
a[c] = input.next().charAt(0);
}
for(int i=0; i<6;i++){
for(int j=0; j<=i; j++){
System.out.print(a[j]);
}
System.out.println();
}
} // Void main
} // Class
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