word inside a tag challenge

Hi,

I am trying below challenge
http://codingbat.com/prob/p184030

I wrote code as below

public String makeOutWord(String out, String word) {
  return out+word+out;
}

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My test cases are failing

How to fix and improve my code. Please advise
LVL 7
gudii9Asked:
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ozoCommented:
Note: use str.substring(i, j) to extract the String starting at index i and going up to but not including index j.
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gudii9Author Commented:
public String makeOutWord(String out, String word) {
  return out.substring(0,2)+word+out.substring(2,4);
}

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i tried as below works good
Expected      Run            
makeOutWord("<<>>", "Yay") → "<<Yay>>"      "<<Yay>>"      OK         
makeOutWord("<<>>", "WooHoo") → "<<WooHoo>>"      "<<WooHoo>>"      OK         
makeOutWord("[[]]", "word") → "[[word]]"      "[[word]]"      OK         
makeOutWord("HHoo", "Hello") → "HHHellooo"      "HHHellooo"      OK         
makeOutWord("abyz", "YAY") → "abYAYyz"      "abYAYyz"      OK         
other tests
OK
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