Good afternoon everyone. Thank you for standing by and welcome to our Arco Platform second quarter, 2021 earnings call. This event is being recorded and all participants will be in a listening only mode during the company's presentation. After our core remarks there will be a question and answer section. At this time further instructions will be given. Should any participants need assistance during this call, please press * 0 to reach the operator. This event is also being broadcast live via webcast and may be accessed through Arco's website at investor.arcoplatform.com where the presentation is also available. Now I will turn the conference to Carina Carreira our core IR director. Carina, you may begin your presentation. Thank you. I'm pleased to welcome you to Arco's second quarter 2021 conference call. With me in the call today we have Arco CO, Ari de Sa Cavalcante Neto, and Arco CF Roberto Otero. During today's presentation our executives will make forward looking statements. Forward looking statements generally relate to future events or future financial or operating performance and involve known and unknown risks, uncertainties, and other factors that may cause inauidble materially from those contemplated by these forward looking statements. Forward looking statements in this presentation include, but are not limited to, statements related to our business and financial performance, our expectations and guidance for future periods, our expectations regarding strategic project initiatives, and their related benefits, and our expectations regarding the market. These risks include those set forth in the documents that we issued earlier today as well as those more fully described in our findings with the securities and exchange commission. The forward looking statements in this presentation are based on the information available to us as of the day hereof. You should not rely on them as prediction of future events and we disclaim any obligation to update any forward looking statements except as required by law. In addition, management may reference non- IFRS financial measures on this call. The non- IFRS financial measures are not intended to be considered in isolation or as a substitute for results prepared in accordance with IFRS. We have provided a reconciliation of these non- IFRS financial measures to the most directly comparable IFRS financial measure in our press release. Please note that except from revenue, gross margin, selling expense, GNA, and cash flow from operations all other financial matters we discuss here are non- IFRS and growth rates are compared to the prior year comparable period unless otherwise stated. We also note that year over year comparisons are effected by acquisitions that were not included in our 2020 financials. Let me now turn the call over to Ari, Arco's CO. Thank you Carina and thanks everyone for joining today's conference call. We hope that you and your families are all healthy and safe. We would like to present four topics today, as shown in slide three. First, on the results we had a 21.9% revenue recognition in the quarter leading to a net revenue of 588 million reals for the first six months of 2021. We're a 18% increase versus the same period of 2020. Adjusted EBITDA this quarter was impacted by lower revenue recognition, product development, and sales force increase as we prepare for a post-pandemic recovery leading to an accumulated adjusted EBITDA margin for the first six months of the year of 22.4%. Despite an even softer third quarter had following historical seasonality trends as Otero will show in a few minutes, we are confident that the fourth quarter will lead us to meet the adjusted EBITDA margin guidance of 35.5% and 37.7% range. The forecast will improve this quarter as we collect the receivables generated by the extinction of payment terms to assist our partner schools, taking us back to our strong cash iteration profile. Second, the commercial cycle for 2022 school year continues to show encouraging results as pandemic related restriction are progressively lift. At this point, we see organic growth base for core solutions in line with pre-pandemic levels while supplemental solutions accelerate versus 2020 but indicate a two-step recovery to pre-pandemic growth rate levels. We are achieving great results from our across sell initiatives which will now be powered by the creation of a centralized supplemental business unit called Arco Plus. Third, as we continue to search for innovative ways of better service our clients and consolidate our leadership position in the industry we launched this year SAS Adapt, a customizable and data-oriented version of SAS, our most premium core solution, allowing us to better serve the premium back segment. SAS Adapt was developed on top of Educause LMS, a solution we acquired in July that will integrate our Arco tech portfolio and has great data and Linux capabilities. And finally we concluded our first step towards disclosure improvement and commitment to increase our impact with the release of our ESG report. I will now turn the call to Otero to discuss the results for the quarter. Otero, please go ahead. Thank you, Ari. And good evening everyone. Thank you for your time. I also hope that you are all safe and healthy. Moving to slide five, net revenues for the second quarter of 2021 were 256 million reals representing a 9% year over year growth and 21. 9% of revenue recognition below the historical average for the quarter, impacted by the second wave of COVID-19. As a result, net revenues for the sixth month of 2021 totaled 528 million reals, 18% above the same period for last year. Lower revenues added to higher costs related to product development and higher selling expenses. Aiming a stronger sales led to an adjusted EBITDA for the quarter of 72.6 million reals, 20% below the second quarter last year with a 28.2% EBITDA margin. Adjusted EBITDA for the first six months of the year totaled 190. 6 million reals, resulting in a 42.4% accumulated margin. Finally, adjusted net income was 36.4 million for the quarter with a 14.2% net margin and 97.5 million for the first six months with 16.6% margin. On slide six, we present a breakdown for our receivables which re- reduce 19% from the first quarter level as we collected the receivables from our partner schools to whom we provided support through more flexible payment terms. That added to the lower effective tax rate resulting from the corporate restructuring led to a significant improvement in the free cash flow this quarter. On slide seven, we provide an update on our ongoing corporate restructuring which will further contribute to our cash iteration in the future. We concluded incorporation of SAS subsidiaries on July 1st, leading to annual savings amounting to 30 million reals. Next steps include incorporation of Nave a Vela this year and escala em movimento, Plena, and Studos in 2022. As we incorporate businesses acquired in the past, we'll be able to capture additional tax benefits and further reduce our effective tax rate. To conclude this session, moving to slide eight, we'd like to take an opportunity to make a quick recap on the seasonality of our business and how we expect this year to behave when compared to historical trends. Adjusted EBTIDA and cash