y,m,d = map(int,input().split('/'))
d += 2
days = [31,28,31,30,31,30,31,31,30,31,30,31]

def uruu(year):
    """ 閏年判定 """
    if year % 400 == 0:
        return True
    elif year % 4 == 0 and year % 100 == 0:
        return False
    elif year % 4 == 0:
        return True
    else:
        return False

if uruu(y):
    days[1] += 1
if d > days[m-1]:
    d -= days[m-1]
    m += 1
if m > 12:
    m -= 12
    y += 1
res = '0' * (4 - len(str(y))) + str(y) + '/'
res += '0' * (2 - len(str(m))) + str(m) + '/'
res += '0' * (2 - len(str(d))) + str(d)
print(res)