# -*- coding: utf-8 -*-

y,m,d = map(int,input().split("/"))
day = [31,28,31,30,31,30,31,31,30,31,30,31]
if y % 4 == 0:
    if y % 100 != 0:
        day[1] = 29
if y % 400 == 0:
    day[1] = 29
d += 2
if day[m-1] < d:
    m += 1
    d -= day[m-2]
if m == 13:
    m = 1
    y += 1


print(str(y) + "/" + str(m).zfill(2) + "/" + str(d).zfill(2))