A male may crack knuckles of a right hand.Logical formLearned from6 sentences. Some knuckles may be cracked.Logical formLearned from6 sentences. Scars can be on knuckles.Logical formLearned from6 sentences. A male may scrub knuckles.Logical formLearned from6 sentences. A person may rub knuckles.Logical formLearned from6 sentences. Knuckles may rap on a door.Logical formLearned from6 sentences. (Toe knuckles) may pertain-to a person.Logical formLearned from6 sentences. Knuckles can be cold.Logical formLearned from6 sentences. A back may pertain-to a knuckle.Logical formLearned from6 sentences. A thumb can be over knuckles.Logical formLearned from6 sentences. A male may run a knuckle.Logical formLearned from6 sentences. A fist may be marred with bloody knuckles.Logical formLearned from6 sentences. A knuckle may drag.Logical formLearned from6 sentences. A person may have knuckles.Logical formLearned from6 sentences. Knuckles can be battered.Logical formLearned from6 sentences.