def comp(a, nums):
    for el in nums:
        if a + el == 2020:
            return el
    return False

def main():
    with open("input1a.txt") as file:
        lines = file.readlines()
    lines = [int(line.strip()) for line in lines]
    cur = -1
    a, b = -1, -1
    while len(lines) > 0:
        a = lines.pop()
        c = comp(a, lines)
        if c:
            b = c
            break
    print(f"{a} * {b} = {a*b}")

if __name__ == "__main__":
    main()