根据天数可以求到月份数，也就是月份从1月开始加，知道大于等于天数就可以，此时就找到了，然后算出是这个月的第几天就行：

record = [0,31,28,31,30,31,30,31,31,30,31,30,31]

def main():
    while True:
        try:
            year,day = map(int,(input().split(" ")))
            record[2] = 28
            if year%400==0 or (year%4==0 and year%100!=0):
                record[2] = 29
            he = 0
            month = 1
            for i in range(1,13):
                he = he+record[i]
                month = i
                if he>= day:
                    break
            day = day+record[month]-he
            print("{:d}-{:0>2}-{:0>2}".format(year,month,day))
        except:
            break
if __name__ == '__main__':
    main()