Topological Sorting

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Problem

Sort items according to their partial ordering.

[Input]
A list of item descriptions is given. One line corresponds to one item. Every item is assigned integer ID.
In a description of an item, the ID of the item is followed by colon, and its precedents.
For example,
1: 2 4 5
means that item 2, 4, 5 must precede item 1.
Every item has its description.

[Output]
Print sorted list of items.
If there are multiple solutions, print lexicographically first one.

Options

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now post-mortem time, all source codes will be revealed

Sample input:_

1:
2: 1 4
3: 1
4:
5: 2 3

Sample output:

1
3
4
2
5

Sample input:_

1: 4
2:
3: 5
4: 3 6
5:
6:
7: 2
8: 3 4 9
9: 3

Sample output:

2
5
3
6
4
1
7
9
8

Sample input:_

1: 65 66
2: 96
3: 36
4: 37
5: 1 47 61
6: 25 26
7: 5
8: 31 62
9: 2 4 56
10: 4 6 54
11: 30 67 68
12: 24 34 78
13: 88
14: 57
15: 53 76 98
16: 11 12 60 69
17: 32 44
18: 25 38
19: 53 60 76
20: 24 27 93
21: 22 28
22: 23 63
23: 71 78 79
24: 28 49
25: 47
26: 53 61 67
27: 52
28: 66
29: 92
30: 33 50 72
31: 64
32: 13
33: 20 58
34: 8 42 51 75
35: 19 67
36: 22 25 48
37: 24 97
38: 2 25 55 99
39: 62 92 96
40: 88 97
41:
42: 9 17 38
43:
44:
45: 10 35 82
46: 4 83
47: 28
48: 79 83
49:
50:
51: 29 58
52: 1 44
53: 24 25 27 41 85
54: 31
55: 30 46 72
56: 40
57: 2 53 54 86
58: 32 67
59: 53
60: 27
61:
62: 82
63: 16 23 62
64: 60
65: 24 29 72 95
66: 92
67: 54 91
68: 13
69: 34 50
70: 3 35 77
71: 26 34 86
72: 28
73: 13 30
74: 20
75: 66
76: 9 10 14 30 84
77: 39 62
78: 73
79: 9 43
80: 12 55
81: 4 55
82: 44 74 91
83: 67 97
84: 24 69
85: 4 16 24 32
86: 9
87: 85
88: 65 74
89: 23 92
90: 7 47
91: 24 41 90
92:
93: 43 52
94: 4 44
95:
96: 64 94
97: 20 78 82
98: 3 22 45
99: 9 20 77 82

Sample output:

41
43
44
49
50
61
92
29
66
28
24
47
25
72
75
95
65
1
5
7
52
27
60
64
31
54
90
91
67
93
20
74
82
62
8
88
13
32
17
58
33
30
51
68
11
73
78
97
37
4
40
56
83
46
55
81
94
96
2
9
39
77
79
48
86
99
38
18
42
34
12
69
16
80
84
85
53
26
6
10
57
14
59
71
23
63
22
21
36
3
76
19
35
45
70
87
89
98
15

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