I have a problem with the following for loop:

```
X="*back* OLD"
for P in $X
do
echo "-$P"
done

```

I need it to output just:

```
-*back*
-OLD

```

However, it lists all files in the current directory matching the `*back*` pattern. For example it gives the following:

```
-backup.bkp
-backup_new.bkp
-backup_X
-OLD

```

How to force it to output the exact pattern?