- N("", "a")
- N("a", "aa")
- N("a", "b")
- N("aa", "ab")
- N("aa", "aaa")
- N("abba", "aba")
- N("abc abc", "abcd")
- N("0-1-2-3-4-5-6-7-8-9", "-3-4-56-7-8-")
- N("0-1-2-3-4-5-6-7-8-9", "-3-4-5+6-7-8-")
- N("_ _ _\xff_ _ _", "_\x7f_")
- N("_ _ _\x7f_ _ _", "_\xff_")
+ N("","a", "a")
+ N("a","a", "aa")
+ N("a","b", "b")
+ N("aa","b", "ab")
+ N("aa","a", "aaa")
+ N("aba","b", "bab")
+ N("abba","b", "bab")
+ N("abba","ba", "aba")
+ N("abc abc","d", "abcd")
+ N("0-1-2-3-4-5-6-7-8-9","", "-3-4-56-7-8-")
+ N("0-1-2-3-4-5-6-7-8-9","", "-3-4-5+6-7-8-")
+ N("_ _ _\xff_ _ _","\x7f_", "_\x7f_")
+ N("_ _ _\x7f_ _ _","\xff_", "_\xff_")