days_in_month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
Y,M,D = map(int,input().split("/"))
D += 2

if Y%4 == 0 and not (Y%100 == 0 and Y%400 != 0):
    days_in_month[1] = 29

if days_in_month[M-1] < D:
    D -= days_in_month[M-1]
    M += 1

if M > 12:
    Y += 1
    M = 1

print(str(Y).zfill(2)+"/"+str(M).zfill(2)+"/"+str(D).zfill(2))