$A\,\, 0\,\, 0\,\, 1\,\, 1$
$B\,\, 0\,\, 1\,\, 0\,\, 1$
$Y \,\,1\,\, 0\,\, 0\,\, 1$
i.e. \(\bar 0.\bar 0 + 0.0 = 1.1 + 0.0 = 1 + 0 = 1\) \(\bar 0.\bar 1 + 0.1 = 1.0 + 0.1 = 0 + 0 = 0\)
\(\bar 1.\bar 0 + 1.0 = 0.1 + 1.0 = 0 + 0 = 0\) \(\bar 1.\bar 1 + 1.1 = 0.0 + 1.1 = 0 + 1 = 1\)