A bit stuck

[jenl2881]

I like puzzles but am a bit unsure of where to start with this one. It’s three series of 2 digit numbers. I think it’s meant to spell something out but I’m not sure.

22 34 24 33 22 44 34 25 24 14 43 42 34 34 32 43 44 34 35

This is the first series.