def main():
case = str(raw_input())
maxInt = 0
current = ""
cInt = ["1","2","3","4","5","6","7","8","9","0"]
LetterUse = False
index = 0
for letter in case:
if(letter not in cInt): ## is a character
if(LetterUse == True):
if(case[index-1] in cInt): ## previous element was a number
current=case[index-1] + "9"
else: ## prev index not a number start from scratch
current = "9"
LetterUse = False
else:
current = current+"9"
LetterUse = True
else:
current+=letter
#print current
if(int(current) > maxInt):
maxInt = int(current)
index+=1
print maxInt
main()
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