Mixed Phones

data_list = input().split(" : ")

phones_dict = {}

while not data_list[0] == 'Over':
    if data_list[1].isdigit():
        key = data_list[0]
        value = data_list[1]
        phones_dict[key] = value
    else:
        key = data_list[1]
        value = data_list[0]
        phones_dict[key] = value

    data_list = input().split(" : ")

#sorted(phones_dict)

for key, value in sorted(phones_dict.items()):
    print(f"{key} -> {value}")