/**
 * This file is part of the 1st Solidity Gas Golfing Contest.
 *
 * This work is licensed under Creative Commons Attribution ShareAlike 3.0.
 * https://creativecommons.org/licenses/by-sa/3.0/
 */

pragma solidity 0.4.24;

contract IndexOf {
    /**
     * @dev Returns the index of the first occurrence of `needle` in `haystack`,
     *      or -1 if `needle` is not found in `haystack`.
     *
     * Input strings may be of any length <2^255.
     *
     * @param haystack The string to search.
     * @param needle The string to search for.
     * @return The index of `needle` in `haystack`, or -1 if not found.
     */
    function indexOf(string haystack, string needle) public pure returns(int) {
    }
}