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## inter
### Instructions
Write a program that takes two `string` and displays, without doubles, the characters that appear in both `string` , in the order they appear in the first one.
- The display will be followed by a newline (`'\n'`).
- If the number of arguments is different from 2, the program displays a newline (`'\n'`).
### Usage
```console
student@ubuntu:~/piscine-go/test$ go build
student@ubuntu:~/piscine-go/test$ ./test "padinton" "paqefwtdjetyiytjneytjoeyjnejeyj"
padinto
student@ubuntu:~/piscine-go/test$ ./test ddf6vewg64f twthgdwthdwfteewhrtag6h4ffdhsd
df6ewg4
student@ubuntu:~/piscine-go/test$
```
