TokenFactoryBoilerplate.sol

pragma solidity ^0.4.16;

contract TokenFactorySolution {

    // creator -> token address
    mapping(address => address[]) public created;
    mapping(address => bool) public isMy1stToken; //verify that given address is of this token type

    function createToken(uint256 _initialAmount, string _name, uint8 _decimals, string _symbol) returns (address) {
        // create a new token with new My1StToken
        // Add to created and isMy1stToken mappings 
        // This factory contract will own the created tokens. You must transfer them. Transfer initalAmount to token creator
    }
}