function main() {
  var spreadsheet;
  var report;
  var label;
  var date = new Date();

 function createReport (labelname, tabellenid) {
    label = AdWordsApp.labels()
    .withCondition("Name ="+labelname)
    .get().next();

  report = AdWordsApp.report(buildSelect(label.getId()));
  spreadsheet = SpreadsheetApp.openById(tabellenid);
  spreadsheet.insertSheet((date.getMonth() + 1) +' '+ date.getYear()).activate();
  report.exportToSheet(spreadsheet.getActiveSheet());
    };

createReport ("Ost", "1WQmcF-FYtnG5shQ3tZeiaYRkqud5kgjRBU6EvlUo52s") +
createReport ("West", "1ldElXG0TYuMatbptGHE6VGcbDY59MNyGBfnSB4R2orE");
}

function buildSelect(id) {
  return 'SELECT CampaignName, Clicks, Conversions, Cost, CostPerConversion ' +
        'FROM   CAMPAIGN_PERFORMANCE_REPORT ' +
        'WHERE  Impressions > 0 AND Labels CONTAINS_ANY [' + id + '] ' +
        'DURING THIS_MONTH';
};