Test case 1
d1,d2,d3,d4,p5,p6,p7,p8,p9
9
p0,p1,p2,p3,p4
5

Test case 2
d1,d2,d3,d4,d5,d6,d7,p5,p6,p7,p8,p9
12
p0,p1,p2,p3,p4
5

Test case 3
d1,d2,d3,d4,d5,d6,d7,p5,,p7,,p9
12
,p1,,p3,
5

Test case 4
P0,P1,P2,d1,d2,d3,P8,P9
8
P3,P4,P5,P6,P7
5

Test case 5
P0,P1,P2,d1,d2,d3,P8,P9
8
P3,P4,P5,P6,P7
5

Test case 6
P0,P1,P2,d1,d2,d3,P4,P5,P6,P7,P8,P9
12
P3
1

Test case 7
expando:0=string
expando:8=lastelement
expando:length=9
expando:shift=function shift() {
    [native code]
}

Test case 8
hello world
11
123,,,,,,,,p9
9

Test case 9
,,,,,,,100
8
2147483649

Test case 10
1,a1,O3,4,a4,O6,7,a7,O9,10,a10,O12,13,a13,O15,16,a16,O18,19
19
10,1,a1,O3,4,a4,O6,7,a7,O9,10,a10,O12,13,a13,O15,16,a16,O18,19
20
10,1,a1,O3,4,a,b,7,a7,O9,10,a10,O12,13,a13,O15,16,a16,O18,19
20
a4,O6
2
10,1,a1,O3,4,a,b,a,b,13,a13,O15,16,a16,O18,19
16
7,a7,O9,10,a10,O12
6
10,1,a1,O3,4,a,b,a,b,13,a,b,c,e,f,16,a16,O18,19
19
a13,O15
2

Test case 11
O0,a1,10,O3,a4
5
a1,10,O3,a4
4
20,a1,10,O3,a4
a1,10,O3,a4
10,40,a1,10,O3,a4
50,10,40,a1,10,O3,a4
10,40,a1,10,O3,a4
O0,a1,10,O3,a4
5
a4,O3,10,a1,O0
5
O0,a1,2,3,4
5
4,3,2,a1,O0
5
1,2,3,O0,a1,10