function _isStraight(uint256 _card) private pure returns(bool _result){
        _result = false;
        if(_card >= 543210){
            if(_isKingKong(_card.sub(12345)) || _isKingKong(_card.sub(543210))){
                _result = true ;
            }
        }else if(_card > 123455){
            if(_isKingKong(_card.sub(12345))){
                _result = true ;
            }
        }else{
            _result = false;
        }
    }