Error message in my deluge scripting. What am I doing wrong?

Error message in my deluge scripting. What am I doing wrong?

I am trying to add an update script to a field, so that when the field called "Complete" is set to "YES" I will get an email saying "Send Thank You Card to <here the name from the "Contact" field should be inserted> on <here I'd like it to insert the date 5 days from now>. Thank you for choosing Atomic Disc to duplicate <here the name from the "Job_Title" field should be inserted>.

Here is the script I've used:

"Send Thank You Card to " + input.Contact + .addDay(5)  +  "Thank you for choosing Atomic Disc to duplicate "  + input.Job_Title

I get the following error message:

Error at line 1 : + not expected.

Can someone please tell me what I am doing wrong?

Thanks,

-silver