Q = [[1, 0],   # A’s query
     [0, 1],   # B’s query
     [1, 1]]   # C’s query

K = [[1, 0],   # A’s key
     [0, 1],   # B’s key
     [1, 1]]   # C’s key

V = [[1, 0],   # A’s value
     [0, 1],   # B’s value
     [1, 1]]   # C’s value