def checkWords(target, text, numLeft = 2, numRight = 2)
	text[/#{"(\\S+) "*numLeft}#{Regexp.escape(target)}#{" (\\S+)"*numRight}/i]
end
puts checkWords('start', 'In software, a stack overflow occurs if the call stack pointer exceeds the stack bound. The call stack may consist of a limited amount of address space, often determined at the start of the program. The size of the call stack depends on many factors, including the programming language, machine architecture, multi-threading, and amount of available memory.')

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