import re
while True:
    try:
        strings = input()
        numbers_list = re.findall('\d+', strings)
        max_len = len(sorted(numbers_list, key=lambda x: len(x), reverse=True)[0])
        result_list = []
        for i in numbers_list:
            if len(i) == max_len:
                result_list.append(i)
        result = ''.join(result_list)
        print(result + ',' + str(max_len))
    except:
        break