You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
## frontback
|
|
|
|
|
|
|
|
|
|
### Instructions
|
|
|
|
|
|
|
|
|
|
Write a program that prints the previous letter and the next letter of the Latin alphabet.
|
|
|
|
|
- If the number of arguments is different from `1`, print a new line `\n`.
|
|
|
|
|
- If the length of the argument is different from `1`, print a new line `\n`.
|
|
|
|
|
- If the argument is not a letter, print a new line `\n`.
|
|
|
|
|
- There are no letters to print before `a` or after `z`.
|
|
|
|
|
|
|
|
|
|
### Usage
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
$ go run . | cat -e
|
|
|
|
|
$
|
|
|
|
|
$ go run . a | cat -e
|
|
|
|
|
ab$
|
|
|
|
|
$ go run . "B" | cat -e
|
|
|
|
|
ABC$
|
|
|
|
|
$ go run . "z" | cat -e
|
|
|
|
|
yz$
|
|
|
|
|
$ go run . "Hello World!" | cat -e
|
|
|
|
|
$
|
|
|
|
|
$ go run . "1" | cat -e
|
|
|
|
|
$
|
|
|
|
|
```
|
