copy & paste into Remix for contract invocation, contract deployed at 0xbf305049bcefe28777104d5cbbcc8f58e6b21f69 Ethereum mainnet

ShuoWeddingContractSource.sol

pragma solidity ^0.4.24;

contract BestWeddingWishes {
    
    string public constant groom = "Shuo, Chang";
    string public constant bride = "Yanyan, Zhang";
    string public constant dateStr = "Aug 5th, 2018";
    
    string[] public wishes;
    
    function add(string _message) external returns (bool) {
        wishes.push(_message);
        return true;
    }
    
    function read(uint256 idx) external view returns (string) {
        return wishes[idx];
    }
    
    function count() external view returns (uint256) {
        return wishes.length;
    }
}