Passage:

When the prize list was pinned to the noticeboard, Sade stood close enough to read the smallest print. Her name was not there. A girl beside her whispered, "That's strange." Sade smiled and said, "Not really." She stepped back, let two other students squeeze in, and began clapping as the headteacher congratulated the winners. Later, she asked the caretaker if he needed help stacking chairs for assembly.

What can most reasonably be inferred about Sade's feelings and how she manages them?