Pattern Recognition - 111

Find out the next two numbers in the series.
6616 , 5814 , 5012 , 4210, _ , _ , .....................


Answer

6616 , 5814 , 5012 , 4210, _ , _ , ..................... 
66 , 58 , 50 ,42 ,.........   Next two numbers 34,26
6616 , 5814 , 5012 , 4210, _ , _ , .....................
16 , 14 , 12 , 10 ,........... Next two numbers  8,6

Next two numbers in the original series 348 , 266
6616 , 5814 , 5012 , 4210, 348 , 266 , .....................

There was another answer from some one at office - 3408, 2606 . I think that is also a correct answer. (to keep the number of digits(4) consistent)