Y, M, D = map(int, input().split('/'))

L = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
if Y % 4 == 0 or Y % 100 == 0 or Y % 400 == 0:
    L[2] = 29

DD = D + 2

if L[M] >= DD:
    print('{:0=2}/{:0=2}/{:0=2}'.format(Y, M, DD))

elif L[M] < DD and M < 12:
    print('{:0=2}/{:0=2}/{:0=2}'.format(Y, M+1, DD-L[M]))

else:
    print('{:0=2}/{:0=2}/{:0=2}'.format(Y+1, 1, DD-31))