while True:
try:
s = input()
dic, temp = {}, ''
for c in s:
if c.isdigit():
temp += c
else:
if temp:
dic[temp] = len(temp)
temp = ''
if temp:
dic[temp] = len(temp)
Max = max(dic.values())
for k in dic:
if dic[k] == Max:
print(k, end='')
print(',' + str(Max))
except:
break