S = input()
i = S.index("/")
j = S[i + 1:].index("/")
j += i + 1
y = int(S[:i])
m = int(S[i + 1:j])
d = int(S[j + 1:])
d += 2
th = [2, 4, 6, 9, 11]
if m == 2:
    if y % 4 == 400 or (y % 4 == 0 and y % 100 != 0):
        m += (d - 1) // 29
        d = 1 + (d - 1) % 29
    else:
        m += (d - 1) // 28
        d = 1 + (d - 1) % 28
elif m in th:
    m += (d - 1) // 30
    d = 1 + (d - 1) % 30
else:
    m += (d - 1) // 31
    d = 1 + (d - 1) % 31
y += (m - 1) // 12
m = 1 + (m - 1) % 12
print(y, end = "/")
if m < 10:
    print(str(0), end = "")
print(m, end = "/")
if d < 10:
    print(0, end = "")
print(d)