Defeated

Went to the gym, then realized it has been awhile since I've been to the gym...I couldn't remember my combo. I knew the numbers were all in the 20s and 30s, all even, and all ending in a different number...that doesn't narrow it down a whole lot. I was nearly to the point of getting it cut off when I got it...but I have no idea which number combination I used to open it. Sigh...