y,m,d=map(int,input().split('/'))
days={1:31,2:28,3:31,4:30,5:31,6:30,7:31,8:31,9:30,10:31,11:30,12:31}
if y%4==0:
	if y%400==0:
		days[2]=29
	elif y%100>0:
		days[2]=29
	
if d+2>days[m]:
	if m==12:
		y+=1
		m=1
		d-=29
	else:
		d+=2-days[m] 
		m+=1
else:
	d+=2
print('{:04}/{:02}/{:02}'.format(y,m,d))