#!/usr/bin/python3

expenses = []
with open("input") as fh:
    for ln in fh:
        expenses.append(int(ln))
for i in range(len(expenses)):
    for j in range(i + 1, len(expenses)):
        if expenses[i] + expenses[j] == 2020:
            print(expenses[i], expenses[j], "sum = ", expenses[i] +
            expenses[j], "mul = ", expenses[i] * expenses[j])