y, m, d = [ int(v) for v in input().split("/") ]
def feb(y):
    if y % 400 == 0:
        return 27
    elif y % 100 == 0:
        return 26
    elif y % 4 == 0:
        return 27
    else:
        return 26

month = [29, feb(y), 29, 28, 29, 28, 29, 29, 28, 29, 28, 29]

if month[m - 1] < d:
    d = d - month[m - 1] 
    m += 1
    if m == 13:
        m = 1
        y += 1
    
else:
    d += 2

y, m, d = map(str, [y, m, d])
m = m.zfill(2)
d = d.zfill(2)
print("/".join([y, m, d]))