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contract DSNote {
    event LogNote(
        bytes4   indexed  sig,
        address  indexed  guy,
        bytes32  indexed  foo,
        bytes32  indexed  bar,
    uint          wad,
        bytes             fax
    ) anonymous;
    modifier note {
        bytes32 foo;
        bytes32 bar;
        assembly {
            foo := calldataload(4)
            bar := calldataload(36)
        }
        LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);
        _;
    }
}
contract ERC20 {
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