contract FortuneTeller {
  function predictStartingIndexes(uint256 maxSupply, uint256 numBlocks) 
    external
    view
    returns 
    (uint256[] memory startingIndexes) {
    startingIndexes = new uint[](numBlocks);
    for (uint256 i = 0; i < numBlocks; ++i) {
        startingIndexes[i] = (uint256(
            keccak256(abi.encodePacked("CoreCollection", block.number + i))
        ) % maxSupply) +
        1;
    }
  }
}
