def func():
    lis = list(input())

    for i in range(len(lis)):    #  将不是数字的字符转换成空格,也可以用Replace
        if not lis[i].isdigit():
            lis[i] = ' '

    res = ''.join(lis)
    res = res.split()   # 划分成数字字符串列表
    max_len = len(res[0])
    for i in res: # 找到最大数字字符串的长度
        if len(i)>max_len:
            max_len = len(i)

    for i in res:  # 打印字符串
        if len(i) == max_len:
            print(i,end='')

    print(',',end='')
    print(max_len)
try:
    while True:
        func()
except EOFError:
    pass