group_of_tens

# no dictionary
numbers_sequence = list(map(int, input().split(", ")))
max_group = max(numbers_sequence) // 10 + 1
if max(numbers_sequence) % 10 == 0:
    max_group -= 1
current_group = 0
for groups in range(max_group):
    group_list = [number for number in numbers_sequence if current_group < number <= (current_group + 10)]
    current_group += 10
    print(f"Group of {current_group}'s: {group_list}")
    group_list.clear()



#with_dictionary
list_numbers = [int(x) for x in input().split(", ")]
sorted_groups = {}
group = 0

while True:
    if not list_numbers:
        break

    if max(list_numbers) > group:
        group += 10

    sorted_groups[group] = [num for num in list_numbers if num <= group]
    list_numbers = [x for x in list_numbers if x > group]

for key, value in sorted_groups.items():
    print(f"Group of {key}'s: {value}")