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    <nameOfIssuer>VANGUARD BD INDEX FD INC</nameOfIssuer>
    <titleOfClass>INTERMED TERM</titleOfClass>
    <cusip>921937819</cusip>
    <value>127541</value>
    <shrsOrPrnAmt>
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      <sshPrnamtType>SH</sshPrnamtType>
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    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>1426000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
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  <infoTable>
    <nameOfIssuer>VANGUARD BD INDEX FD INC</nameOfIssuer>
    <titleOfClass>TOTAL BND MRKT</titleOfClass>
    <cusip>921937835</cusip>
    <value>137412</value>
    <shrsOrPrnAmt>
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    <votingAuthority>
      <Sole>1608100</Sole>
      <Shared>0</Shared>
      <None>0</None>
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  <infoTable>
    <nameOfIssuer>VANGUARD SCOTTSDALE FDS</nameOfIssuer>
    <titleOfClass>LG-TERM COR BD</titleOfClass>
    <cusip>92206C813</cusip>
    <value>48672</value>
    <shrsOrPrnAmt>
      <sshPrnamt>461000</sshPrnamt>
      <sshPrnamtType>SH</sshPrnamtType>
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    <investmentDiscretion>SOLE</investmentDiscretion>
    <votingAuthority>
      <Sole>461000</Sole>
      <Shared>0</Shared>
      <None>0</None>
    </votingAuthority>
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