S=list(input())

y=int(S[0]+S[1]+S[2]+S[3])
m=int(S[5]+S[6])
d=int(S[8]+S[9])

d=d+2

if( m==2):
    #閏年
    if(y% 4 ==0 ):
        if(y % 100!=0):
           if(d>29):
              d=d-29
              m=m+1
              y=y
           else:
             d=d
             m=m
             y=y
        elif(y % 100 ==0 and y % 400 ==0):
            if(d>29):
               d=d-29
               m=m+1
               y=y
            else:
               d=d
               m=m
               y=y
        else:
            if(d>28):
               d=d-28
               m=m+1
               y=y
            else:
               d=d
               m=m
               y=y
    else:
        
        if(d>28):
           d=d-28
           m=m+1
           y=y
        else:
           d=d
           m=m
           y=y

elif( m==4 or m==6 or m==9 or m==11):
    if(d>30):
        d=d-30
        m=m+1
        y=y

    else:
        d=d
        m=m+1
        y=y

elif( m==12):
    if(d>31):
       d=d-31
       m=1
       y=y+1
    else:
       d=d
       m=m
       y=y
else:
    if(d>31):
       d=d-31
       m=m+1
       y=y
    else:
       d=d
       m=m
       y=y

print(y,end='')
print('/',end='')
if(m<10):
   print(0,end='')
   print(m,end='')
else:
   print(m,end='')

print('/',end='')

if(d<10):
   print(0,end='')
   print(d)
else:
   print(d)