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dsawyer@methacton.org string_packet_level_1 > replace
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Given a string, return a string which replaces the character at index n with the specified letter. Assume that the index is valid and not out-of-bounds.


replace("hut", "a", 1) → "hat"
replace("lights", "Q", 3) → "ligQts"
replace("Balloons", "w", 2) → "Bawloons"

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public String replace( String s, String letter, int index ){ }

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