import java.util.*;
import java.lang.*;
import java.io.*;

class Main {
    public static String decrypt(String s1, String s2, String s3){
        char[] t1=s1.toCharArray();
        char[] t2=s2.toCharArray();
        char[] t3=s3.toCharArray();
        String s="";
        for(int i=0; i<s1.length(); i++){
            s+=t1[i];
            s+=t2[i];
            s+=t3[i];
        }
        return s;
    }
    public static void main(String[] args) {
        System.out.println(decrypt("ADG","BEH","CFI"));
    }
}