Special add pattern

Adds 2 numbers and to the sum adds the 2nd number, if lengths are the same than after 10 repitions we gt the 1st number back!
After adding knock off any last carry over that will make number have more digits than original
Add 4 and 3 like this 10 times and you get 4 back at the 10th

Number 1
Number 2
 
2325
2325
----
4640
2325
----
6965
2325
----
8280
2325
----
0505
2325
----
2820
2325
----
4145
2325
----
6460
2325
----
8785
2325
----
0000
2325
----
2325


Count: 10