# Input date and time in ISO 8601 format
# Example: 2001-01-01T00:00:00Z for 1 Jan 2001, 0 GMT

var Instant = java.time.Instant;
var ChronoUnit = java.time.temporal.ChronoUnit;
print("Enter date time:");
var sec = Instant.parse(readLine()).
      until(Instant.now(), ChronoUnit.SECONDS);
print(sec);