from typing import List

def convert_input_to_int_list(input_str: str, delimiter: str="\n") -> List:
    input_list: List = input_str.split(delimiter)
    number_list: List = []
    for item in input_list:
        number_list.append(int(item))
    return number_list

def solve_puzzle(input_str: str, delimiter: str="\n") -> int:
    visited_frequencies = []
    number_list: List = convert_input_to_int_list(input_str, delimiter)
    print(f"Test case: {number_list}")
    current_frequency: int = 0