I have some variables as below:

```
$a = "string1"
$b = "string2"
$c = "string3"

```

Now i want to define a variable $list to with all of the content from $a,$b,$c to look like this:

```
$list = "
a: string1
b: string2
c: string3
"

```

how can i do that?

\*\*\* Edit: the content of the list must be EXACT like i wrote, that means, the part like "a: " b: ", ... must be the same too