n = list(map(int, list(input())))

for i in range(len(n)):
	if n[i] == 3:
		n[i] = 2
		for j in range(i+1, len(n)):
			n[j] = 9

s = sum(n)
if s % 3 == 0:
	j = -1
	while n[j] == 0:
		n[j] = 9
		j -= 1
	n[j] -= 1
	
print(*n, sep='')