Merging two files by a column and add 0 when entry is missing

I have two files as below.

• File1
  There are five countries in File1

    >USA
    >England
    >France
    >Japan
    >Thailand

• File2
  There are only four in File2

    >USA
    >England
    >Japan
    >Thailand

I use paste -d "," file1.txt file2.txt1 to merge the two files together

• output

    >USA ,>USA
    >England,>England
    >France,>Japan
    >Japan,>Thailand
    >Thailand,

As you can see here, the order of the list from the two files for the output doesn’t align with each other because one value is missing in File2 -France. Instead, it shifts and changes after the 3rd row -"France"

-Desire output

    >USA       >USA
    >England   >England
    >France    >0 (or any symbols)
    >Japan     >Japan
    >Thailand  >Thailand  

    

How can I write a UNIX command statement that replaces 0 or any symbols @#$%>|:" etc for the missing values,but the remaining order stay matched with each other? What need to be added, changed, or modified for the paste -d "," file1.txt file2.txt1

Any help would be highly appreciated. Thank you.

>Solution :

With your shown samples and attempts please try following awk solution. Using awk + column combination here. You need to pass file2 and file1 respectively files into it and we should be Good to go here. For lines missing in file1 are having >0 you can change it as per your requirement too as mentioned in your question.

awk '
BEGIN{ OFS="\t" }
FNR==NR{
  arr[$0]
  next
}
{
  print (($0 in arr)?$0 OFS $0:$0 OFS ">0")
}
' file2 file1 | column -t -s $'\t'