Because of the existence of many patterns for which fingers and a thumb are put together, in what direction a palm is oriented (outward, inward, upward or otherwise), and so forth, there are many variations of this inso.
親指とどの指を合わせるか、手のひらを前に向けるか自分に向けるか上に向けるかなどによって様々なバリエーションがある。