$months = [
  31, 28, 31, 30,
  31, 30, 31, 31,
  30, 31, 30, 31
]

year, month, day = gets.chomp.split('/').map &:to_i
day += 2

# @param int year
# @return bool
def uruh?(year)
  if year % 4 == 0
    if year % 100 == 0 and year % 400 != 0
      return false
    end
    return true
  end
  return false
end

if month == 2
  if uruh?(year)
    if day > 29
      day -= 29
      month += 1
    end
  else
    if day > $months[month - 1]
      day -= $months[month - 1]
      month += 1
    end
  end
else
  if day > $months[month - 1]
    day -= $months[month - 1]
    month += 1
  end
end

if month > 12
  year += 1
  month -= 12
end

puts format("%04d/%02d/%02d", year, month, day)