  Interference alignment (IA) adjusts signaling scheme such that all
interfering signals are squeezed in interference subspace. IA mostly achieves
its performance via infinite extension of the channel, which is a major
challenge for IA in practical systems. In this paper, we make part of
interference very strong and achieve perfect IA within limited number of
channel extensions. A single-hop $3$ user single antenna interference channel
(IFC) is considered and it is shown that only one of the interfering signal
streams needs to be strong so that perfect IA is feasible.
