my %structure = (
    dirs    => {
        albemarle    => {
            dirs    => {
                chatauqua    => {},
                cattaraugus => {},
            },
            files    => [ qw( washington adams jefferson ) ],
        },
        beverly        => {
            dirs    => {
                ataturk    => {},
                bonaparte => {},
            },
            files    => [ qw( madison monroe jackson ) ],
        },
        cortelyou        => {
            dirs    => {
                peoria    => {},
                paducah => {},
            },
            files    => [ qw( vanburen harrison tyler ) ],
        },
    },
    files    => [ qw( alpha beta gamma ) ],
);