y,m,d=list(map(int,input().split("/")))
d+=2
if m in [1,3,5,7,8,10,12] and d>31:
    d,m=d-31,m+1
elif m in [4,6,9,11] and d>30:
    d,m=d-30,m+1
elif d>29 and y%4==0 or y%400==0:
    d,m=d-29,m+1
elif d>28:
    d,m=d-28,m+1    


if m>12:
    m,y=m-12,y+1
def f(n):
    if n<10:
        return "0"+str(n)
    return str(n)
print(f(y)+"/"+f(m)+"/"+f(d))