a.
-a-b-
-a-b-
-a  b-
-a  b-
-a-b\-
-a  b\-
-\-a  b\-
-\ a  b\-
-\-a  b\-
-\ a  b\-
argv[1] = <^A>
argv[1] = <^A>
argv[1] = <^?>
argv[1] = <^?>
argv[1] = <abcd>
1: x[A] y[B] z[]
1a:
2: x[A B]
[A B ]
[ A B ]
==aa==
====
====
argv[1] = < foo>
argv[1] = < foo>
argv[1] = <foo>
argv[1] = < foo>
argv[1] = <foo>
argv[1] = <foo>
argv[1] = < foo>