John is one year older than his wife Mary. They have three children, whose ages are two years apart.  The product of John and Mary\textquotesingle{} s ages is less than 2019. The product of the three children\textquotesingle{} s ages is also less than 2019.  Next year both these products will be greater than 2020.  This year, what is the sum of all five ages? 
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