{"pre_text": ["mastercard incorporated notes to consolidated financial statements 2014 ( continued ) ( in thousands , except percent and per share data ) the company does not make any contributions to its postretirement plan other than funding benefits payments .", "the following table summarizes expected net benefit payments from the company 2019s general assets through 2018 : benefit payments expected subsidy receipts benefit payments ."], "post_text": ["the company provides limited postemployment benefits to eligible former u.s .", "employees , primarily severance under a formal severance plan ( the 201cseverance plan 201d ) .", "the company accounts for severance expense in accordance with sfas no .", "112 , 201cemployers 2019 accounting for postemployment benefits 201d by accruing the expected cost of the severance benefits expected to be provided to former employees after employment over their relevant service periods .", "the company updates the assumptions in determining the severance accrual by evaluating the actual severance activity and long-term trends underlying the assumptions .", "as a result of updating the assumptions , the company recorded severance expense ( benefit ) related to the severance plan of $ 2643 , $ ( 3418 ) and $ 8400 , respectively , during the years 2008 , 2007 and 2006 .", "the company has an accrued liability related to the severance plan and other severance obligations in the amount of $ 63863 and $ 56172 at december 31 , 2008 and 2007 , respectively .", "note 13 .", "debt on april 28 , 2008 , the company extended its committed unsecured revolving credit facility , dated as of april 28 , 2006 ( the 201ccredit facility 201d ) , for an additional year .", "the new expiration date of the credit facility is april 26 , 2011 .", "the available funding under the credit facility will remain at $ 2500000 through april 27 , 2010 and then decrease to $ 2000000 during the final year of the credit facility agreement .", "other terms and conditions in the credit facility remain unchanged .", "the company 2019s option to request that each lender under the credit facility extend its commitment was provided pursuant to the original terms of the credit facility agreement .", "borrowings under the facility are available to provide liquidity in the event of one or more settlement failures by mastercard international customers and , subject to a limit of $ 500000 , for general corporate purposes .", "a facility fee of 8 basis points on the total commitment , or approximately $ 2030 , is paid annually .", "interest on borrowings under the credit facility would be charged at the london interbank offered rate ( libor ) plus an applicable margin of 37 basis points or an alternative base rate , and a utilization fee of 10 basis points would be charged if outstanding borrowings under the facility exceed 50% ( 50 % ) of commitments .", "the facility fee and borrowing cost are contingent upon the company 2019s credit rating .", "the company also agreed to pay upfront fees of $ 1250 and administrative fees of $ 325 for the credit facility which are being amortized straight- line over three years .", "facility and other fees associated with the credit facility or prior facilities totaled $ 2353 , $ 2477 and $ 2717 for each of the years ended december 31 , 2008 , 2007 and 2006 , respectively .", "mastercard was in compliance with the covenants of the credit facility and had no borrowings under the credit facility at december 31 , 2008 or december 31 , 2007 .", "the majority of credit facility lenders are customers or affiliates of customers of mastercard international .", "in june 1998 , mastercard international issued ten-year unsecured , subordinated notes ( the 201cnotes 201d ) paying a fixed interest rate of 6.67% ( 6.67 % ) per annum .", "mastercard repaid the entire principal amount of $ 80000 on june 30 ."], "table": [["", "benefit payments", "expected subsidy receipts", "net benefit payments"], ["2009", "$ 2641", "$ 77", "$ 2564"], ["2010", "3139", "91", "3048"], ["2011", "3561", "115", "3446"], ["2012", "3994", "140", "3854"], ["2013", "4357", "169", "4188"], ["2014 2013 2018", "25807", "1269", "24538"]], "table_ori": [["", "Benefit Payments", "Expected Subsidy Receipts", "Net Benefit Payments"], ["2009", "$2,641", "$77", "$2,564"], ["2010", "3,139", "91", "3,048"], ["2011", "3,561", "115", "3,446"], ["2012", "3,994", "140", "3,854"], ["2013", "4,357", "169", "4,188"], ["2014 – 2018", "25,807", "1,269", "24,538"]]}

Question: what is the variation observed in the net benefit payments during 2012 and 2011?
Evidence:
table_3: the 2011 of benefit payments is 3561 ; the 2011 of expected subsidy receipts is 115 ; the 2011 of net benefit payments is 3446 ;
table_4: the 2012 of benefit payments is 3994 ; the 2012 of expected subsidy receipts is 140 ; the 2012 of net benefit payments is 3854 ;
Program: subtract(3854, 3446)
Answer:
str_answer: 408
exe_answer: 408