import itertools
import sys

def func(value):
    value_len = len(value)
    new_value = ''
    for i in range(value_len):
        if i == value_len - 1:
            new_value += value[i]
        else:
            new_value += value[i] + '-'

    max_dots = value_len - 1
    indexes = []
    for i in range(max_dots):
        indexes.append(i * 2 + 1)

    for i in range(max_dots):
        combinations = itertools.combinations(indexes, i + 1)
        for combination in combinations:
            output = new_value
            for index in indexes:
                if index in combination:
                    output_list = list(output)
                    output_list[index] = '.'
                    output = ''.join(output_list)
            output = output.replace('-', '')
            print(output)

if len(sys.argv) == 2:
    string = sys.argv[1]
    if string.isalnum():
        func(string)
    else:
        print('Input must be alphanumeric')