create implication child_swap (160) -> relative_swap (230)
create implication sibling_swap (68) -> relative_swap (230)
create implication son_swap (121) -> child_swap (160)
create implication daughter_swap (31) -> child_swap (160)
create implication brother_swap (43) -> sibling_swap (68)
create implication sister_swap (41) -> sibling_swap (68)