{"sync-after-first-event", required_argument, 0, 'a'},
{"sync-before-last-event", required_argument, 0, 'b'},
{"sync-before-last-event-touch", required_argument, 0, 'c'},
{"sync-after-first-event", required_argument, 0, 'a'},
{"sync-before-last-event", required_argument, 0, 'b'},
{"sync-before-last-event-touch", required_argument, 0, 'c'},