Just curious what letter do you think your kid struggled with the most. Avian can't say D's yet guck…

Just curious what letter do you think your kid struggled with the most. Avian can't say D's yet guck is duck and colk is cold etc. 😂 Nothing I'm concerned about he's got lots of time to learn just wondering since every child is different. I hear R's and T's can be hard as well. Just looking for a lighthearted conversation if anyone else has any funny "words" their child said because they couldn't pronounce something properly.