1 <div tabindex="+4"></div> => 4
2 <div tabindex="-4"></div> => -4
3 <div tabindex="+-4"></div> => -1
4 <div tabindex="-+4"></div> => -1
5 <div tabindex="+04"></div> => 4
6 <div tabindex="-04"></div> => -4
7 <div tabindex="+"></div> => -1
8 <div tabindex="-"></div> => -1
9 <div tabindex=" +4"></div> => 4
10 <div tabindex=" -4"></div> => -4
11 <div tabindex=" +-4"></div> => -1
12 <div tabindex=" -+4"></div> => -1
13 <div tabindex=" +04"></div> => 4
14 <div tabindex=" -04"></div> => -4
15 <div tabindex=" +"></div> => -1
16 <div tabindex=" -"></div> => -1
17 <div tabindex="+4 "></div> => 4
18 <div tabindex="-4 "></div> => -4
19 <div tabindex="+-4 "></div> => -1
20 <div tabindex="-+4 "></div> => -1
21 <div tabindex="+04 "></div> => 4
22 <div tabindex="-04 "></div> => -4
23 <div tabindex="+ "></div> => -1
24 <div tabindex="- "></div> => -1
25 <div tabindex="	+4"></div> => 4
26 <div tabindex="	-4"></div> => -4
27 <div tabindex="	+-4"></div> => -1
28 <div tabindex="	-+4"></div> => -1
29 <div tabindex="	+04"></div> => 4
30 <div tabindex="	-04"></div> => -4
31 <div tabindex="	+"></div> => -1
32 <div tabindex="	-"></div> => -1
33 <div tabindex="+4	"></div> => 4
34 <div tabindex="-4	"></div> => -4
35 <div tabindex="+-4	"></div> => -1
36 <div tabindex="-+4	"></div> => -1
37 <div tabindex="+04	"></div> => 4
38 <div tabindex="-04	"></div> => -4
39 <div tabindex="+	"></div> => -1
40 <div tabindex="-	"></div> => -1
73 <div tabindex=" +4"></div> => -1
74 <div tabindex=" -4"></div> => -1
75 <div tabindex=" +-4"></div> => -1
76 <div tabindex=" -+4"></div> => -1
77 <div tabindex=" +04"></div> => -1
78 <div tabindex=" -04"></div> => -1
79 <div tabindex=" +"></div> => -1
80 <div tabindex=" -"></div> => -1
81 <div tabindex="+4 "></div> => 4
82 <div tabindex="-4 "></div> => -4
83 <div tabindex="+-4 "></div> => -1
84 <div tabindex="-+4 "></div> => -1
85 <div tabindex="+04 "></div> => 4
86 <div tabindex="-04 "></div> => -4
87 <div tabindex="+ "></div> => -1
88 <div tabindex="- "></div> => -1
89 <div tabindex="+4xx"></div> => 4
90 <div tabindex="-4xx"></div> => -4
91 <div tabindex="+-4xx"></div> => -1
92 <div tabindex="-+4xx"></div> => -1
93 <div tabindex="+04xx"></div> => 4
94 <div tabindex="-04xx"></div> => -4
95 <div tabindex="+xx"></div> => -1
96 <div tabindex="-xx"></div> => -1
97 <div tabindex="+4"></div> => 4
98 <div tabindex="-4"></div> => -4
99 <div tabindex="+-4"></div> => -1
100 <div tabindex="-+4"></div> => -1
101 <div tabindex="+04"></div> => 4
102 <div tabindex="-04"></div> => -4
103 <div tabindex="+"></div> => -1
104 <div tabindex="-"></div> => -1
105 <div tabindex="+4/"></div> => 4
106 <div tabindex="-4/"></div> => -4
107 <div tabindex="+-4/"></div> => -1
108 <div tabindex="-+4/"></div> => -1
109 <div tabindex="+04/"></div> => 4
110 <div tabindex="-04/"></div> => -4
111 <div tabindex="+/"></div> => -1
112 <div tabindex="-/"></div> => -1