Разделите слова на пять групп: to connect ,leg ,hand, cervical, to compose, foot, lumbar, arm ,breastbone ,things, 12 pairs of ribs, to form ,forearm ,thoracic, fingers ,sacral ,coccyx.

1 группа-leg, hand, cervical, foot, lumbar, arm, breastbone, things, pairs, forearm, thoracic, fingers, sacral, coccym
2 группа- to connect, to compose, to form