Who was the president of USA before John F. Kennedy was assassinated?

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Chapter 50 done and please make this silly humble author more happier by voting, commenting and sharing as always. Your comments really make my day. I love y'all so much you know! We're 50 away from 100 and I'm so delighted to see y'all so interested in solving the riddles I bring.

Congrats to us on 1k views! Thanks for helping me reach this peek so soon. See you guys soon!!!