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< p > Given a string < code > s< / code > , reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.< / p >
< p > < / p >
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< p > < strong class = "example" > Example 1:< / strong > < / p >
< pre >
< strong > Input:< / strong > s = " Let' s take LeetCode contest"
< strong > Output:< / strong > " s' teL ekat edoCteeL tsetnoc"
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< / pre >
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< p > < strong class = "example" > Example 2:< / strong > < / p >
< pre >
< strong > Input:< / strong > s = " Mr Ding"
< strong > Output:< / strong > " rM gniD"
< / pre >
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< p > < / p >
< p > < strong > Constraints:< / strong > < / p >
< ul >
< li > < code > 1 < = s.length < = 5 * 10< sup > 4< / sup > < / code > < / li >
< li > < code > s< / code > contains printable < strong > ASCII< / strong > characters.< / li >
< li > < code > s< / code > does not contain any leading or trailing spaces.< / li >
< li > There is < strong > at least one< / strong > word in < code > s< / code > .< / li >
< li > All the words in < code > s< / code > are separated by a single space.< / li >
< / ul >
