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## fromto
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### Instructions
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- Write a function that takes two `integers` and returns a string representing the range of numbers from the first to the second.
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- The function can return the numbers in any order.
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- The number must be separated by a comma and a space.
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- If any of the arguments is bigger than 99 or less than 0, the function returns `"invalid"` followed by a newline (`'\n'`).
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- Add `0` at the first of any number if it is less than 10.
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- Add a new line (`'\n'`) at the end of the string.
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### Expected function
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```go
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func FromTo(from int, to int) string {
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}
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```
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### Usage
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Here is a possible program to test your function :
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```go
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package main
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import (
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"fmt"
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)
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func main() {
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fmt.Println(FromTo(1, 10))
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fmt.Println(FromTo(10, 1))
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fmt.Println(FromTo(10, 10))
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fmt.Println(FromTo(100, 10))
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}
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```
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And its output :
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```console
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$ go run . | cat -e
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01, 02, 03, 04, 05, 06, 07, 08, 09, 10$
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10, 09, 08, 07, 06, 05, 04, 03, 02, 01$
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10$
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invalid$
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```
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