!752

answer {
  if (match("if * was yesterday, what will be tomorrow?", s, m)
    || match("if * was yesterday, what is tomorrow?", s, m)
    || match("if * was yesterday, tomorrow is...?", s, m))
    ret toWeekDay(fromWeekDay(m.unq(0))+2);
}

static L<S> weekdays = litlist("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday");

static S toWeekDay(int n) {
  ret weekdays.get(mod(n, 7));
}

static int fromWeekDay(S day) {
  ret indexOfIgnoreCase(weekdays, day);
}