uint256 nonce = 0;

struct Stack{
      uint256[5] ids;
      address owner;
      uint32 block;
    }

 mapping (bytes32 => Stack) public stacks;

function submitStack(uint256 _id,uint256 _id2,uint256 _id3,uint256 _id4,uint256 _id5, bool _public)
  public
  returns (bool)
  {
      require(slammerTime!=address(0));
      require(tokenIndexToOwner[_id]==msg.sender);
      require(tokenIndexToOwner[_id2]==msg.sender);
      require(tokenIndexToOwner[_id3]==msg.sender);
      require(tokenIndexToOwner[_id4]==msg.sender);
      require(tokenIndexToOwner[_id5]==msg.sender);
      require(approve(slammerTime,_id));
      require(approve(slammerTime,_id2));
      require(approve(slammerTime,_id3));
      require(approve(slammerTime,_id4));
      require(approve(slammerTime,_id5));

      bytes32 stack = keccak256(nonce++,msg.sender);
      uint256[5] memory ids = [_id,_id2,_id3,_id4,_id5];
      stacks[stack] = Stack(ids,msg.sender,uint32(block.number));

      SubmitStack(msg.sender,now,stack,_id,_id2,_id3,_id4,_id5,_public);
    }
    event SubmitStack(address indexed _sender,uint256 indexed timestamp,bytes32 indexed _stack,uint256 _token1,uint256 _token2,uint256 _token3,uint256 _token4,uint256 _token5,bool _public);