format_string = " {:10} {:10} {:10} {:10} "
print format_string.format('a', 'b', 'a and b', 'a or b')
dash10 = '-' * 10
print format_string.format(dash10, dash10, dash10, dash10)
for a in (True, False):
  for b in (True, False):
    a_and_b = a and b
    a_or_b = a or b
    print format_string.format(str(a), str(b), 
                               str(a_and_b), str(a_or_b))