If it is a puzzle
Then we only need these characters "WhyTheCombOfNatashaOtomoskiHas21Teethtxt"

If it is a riddle
it can be any character and I don't think that's possible to solve

If it's both (what I think) then we need
WhyTheCombOfNatashaOtomoskiHas21Teethtxt
To be 32 chars example:
hyheombfatashatomoskias21eethtxt
Then make words out of that