## displayz

### Instructions

Write a program that takes a `string`, and displays the first `z` character it encounters in it, followed by a newline (`'\n'`).
If there are no `z` characters in the string, the program just writes `z` followed by a newline (`'\n'`).
If the number of arguments is not 1, the program displays a `z` followed by a newline (`'\n'`).

### Usage

```console
$ go run . "xyz"
z
$ go run . "bcvbvZ"
z
$ go run . "nbv"
z
$
```