Continuing with the 46 problems, number 23 was a function that receives a sentence and eliminates any double spaces, as well as adds one after a point if there was not one already. My teacher Ken helped me with this:
Number 24 was a function that receives a verb and returns its third person form:
And number 25 was a function that receives a verb in infinitive and returns its present participle form:
And with that, I finished the section of very simple exercises!