while True:
try:
import collections
s = input()
for c in s:
if not c.isdigit():
s = s.replace(c, ' ')
s = s.split()
max_length = 0
dic = collections.defaultdict(list)
for num in s:
max_length = max(max_length, len(num))
dic[len(num)].append(num)
res = ''
for num in dic[max_length]:
res += num
print('{0},{1}'.format(res,max_length))
except:
break



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