calendar = input().split('/')
year = int(calendar[0])
month = int(calendar[1])
day = int(calendar[2])

uru = False

if year % 4 == 0:
    uru = True
if uru:
    if year % 100 == 0 and year % 400 != 0:
        uru = False
    
last_day = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

if day + 2 > last_day[month-1]:
    if uru and month == 2:
        if day + 2 > last_day[month-1] + 1:
            day = (day+2) - (last_day[month-1]+1)
            month = month + 1
        else:
            day = day + 2
    else:
        if day + 2 > last_day[month-1]:
            day = (day+2) - last_day[month-1]
            month = month + 1
        else:
            day = day + 2
else:
    day = day + 2
    
if month == 13:
    month = 1
    year = year + 1
    
year = str(year)
month = str(month)
day = str(day)

res = []
res.append(year)
if len(month) < 2:
    month = '0' + month
res.append(month)
if len(day) < 2:
    day = '0' + day
res.append(day)

print(res[0] + '/' + res[1] + '/' + res[2])