import sys
import typing


def main() -> int:
    inputs = [int(s) for s in sys.stdin.read().split()]
    for i, j in _find_2020_pairs(inputs):
        print(f"pair: {i} * {j} == {i * j}")

    for i, j, k in _find_2020_triplets(inputs):
        print(f"triplet: {i} * {j} * {k} == {i * j * k}")
    return 0


def _find_2020_pairs(
    inputs: typing.List[int],
) -> typing.Generator[typing.Tuple[int, ...], None, None]:
    found = []

    for i, in0 in enumerate(inputs):
        for j, in1 in enumerate(inputs):
            if i == j:
                continue
            if in0 + in1 == 2020:
                to_yield = tuple(sorted([in0, in1]))
                if to_yield not in found:
                    yield to_yield
                found.append(to_yield)


def _find_2020_triplets(
    inputs: typing.List[int],
) -> typing.Generator[typing.Tuple[int, ...], None, None]:
    found = []

    for i, in0 in enumerate(inputs):
        for j, in1 in enumerate(inputs):
            for k, in2 in enumerate(inputs):
                if i == j or i == k:
                    continue
                if in0 + in1 + in2 == 2020:
                    to_yield = tuple(sorted([in0, in1, in2]))
                    if to_yield not in found:
                        yield to_yield
                    found.append(to_yield)


if __name__ == "__main__":
    sys.exit(main())