10. Shellbound

import math

command = input()
shells_area = {}
new_dict = {}
result = 0

while not command == "Aggregate":
    city, shell_size = [item for item in command.split(" ")]
    if not city in shells_area:
        shells_area[city] = [shell_size]
    else:
        if shell_size not in shells_area[city]:
            shells_area[city].append(shell_size)
    sum_shells = sum(list(map(int, shells_area[city])))
    count_shells = len(shells_area[city])

    result_shels = math.ceil(sum_shells -(sum_shells / count_shells))
    new_dict[city] = result_shels
    command = input()

for key, value in shells_area.items():
    print(f"{key} -> {', '.join(value)} ({new_dict[key]})")