Apple invoice --> extracting the Ordernumer failed

Hej Forum,
since days i tried - without success - to extract the 10-digit-Ordernumber with
"Content matches" from my invoice i have gotten from Apple/Apple-Store.
Does someone tried that or can help me to catch the Ordernumber out of that invoice to be possible to add that to a filename?
I tried "a1a1a1a1a1a1a1a1a1a1" with Hazel but that does´nt work. The Ordernumber is allways in capitalised letters.
Within are one or two Numbers in a different position changing from invoice to invoice.
Thanks for feedback....
Any suggustions are welcome...
Rolf
since days i tried - without success - to extract the 10-digit-Ordernumber with
"Content matches" from my invoice i have gotten from Apple/Apple-Store.
Does someone tried that or can help me to catch the Ordernumber out of that invoice to be possible to add that to a filename?
I tried "a1a1a1a1a1a1a1a1a1a1" with Hazel but that does´nt work. The Ordernumber is allways in capitalised letters.
Within are one or two Numbers in a different position changing from invoice to invoice.
Thanks for feedback....
Any suggustions are welcome...
Rolf