First word 1 letter long the 20th twenty letters long!

"I do not know where family doctors acquired illegibly perplexing handwriting;

nevertheless, extraordinary pharmaceutical intellectuality counterbalancing

indecipherability transcendentalizes intercommunication's incomprehensibleness."

This is a sentence where the first word is one letter long, the second is a word of two letters; the third word is

three letters long ............ the 8th word is 8 letters long and so on ... with the 20th word being 20 letters

long !