[A][B][C][D][E]

1) [A][B][C]
2) [B][C][D]
3) [C][D][E]
4) [A][B]
5) [B][C]
6) [C][D]
7) [D][E]
8) [A]
9) [B]
10)[C]
11)[D]
12)[E]

1) Hash#1  ([A][B][C])
2) Hash#2  ([B][C][D])
3) Hash#3  ([C][D][E])
4) Hash#4  ([A][B])
5) Hash#5  ([B][C])
6) Hash#6  ([C][D])
7) Hash#7  ([D][E])
8) Hash#8  ([A])
9) Hash#9  ([B])
10)Hash#10 ([C])
11)Hash#11 ([D])
12)Hash#12 ([E])

var sourceData = "ABCDEFGHIJK";

var subs = [];

var dataLength = sourceData.length;

var maxLength = 8;

var minLength = 1;

var length = maxLength;

while (length >= minLength) {

    var index = 0;

    while (index + length <= dataLength) {

        var sub = sourceData.substring(index, index + length);

        subs.push(sub);

        index++;
    }

    length--;
}

0: 'ABCDEFGH'
1: 'BCDEFGHI'
2: 'CDEFGHIJ'
3: 'DEFGHIJK'
4: 'ABCDEFG'
5: 'BCDEFGH'
6: 'CDEFGHI'
7: 'DEFGHIJ'
8: 'EFGHIJK'
9: 'ABCDEF'
10: 'BCDEFG'
11: 'CDEFGH'
12: 'DEFGHI'
13: 'EFGHIJ'
14: 'FGHIJK'
15: 'ABCDE'
16: 'BCDEF'
17: 'CDEFG'
18: 'DEFGH'
19: 'EFGHI'
20: 'FGHIJ'
21: 'GHIJK'
22: 'ABCD'
23: 'BCDE'
24: 'CDEF'
25: 'DEFG'
26: 'EFGH'
27: 'FGHI'
28: 'GHIJ'
29: 'HIJK'
30: 'ABC'
31: 'BCD'
32: 'CDE'
33: 'DEF'
34: 'EFG'
35: 'FGH'
36: 'GHI'
37: 'HIJ'
38: 'IJK'
39: 'AB'
40: 'BC'
41: 'CD'
42: 'DE'
43: 'EF'
44: 'FG'
45: 'GH'
46: 'HI'
47: 'IJ'
48: 'JK'
49: 'A'
50: 'B'
51: 'C'
52: 'D'
53: 'E'
54: 'F'
55: 'G'
56: 'H'
57: 'I'
58: 'J'
59: 'K'