1	2
2	4
4	5
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	15
15	16
16	17
17	18
18	19
19	20
20	21
21	23
23	24
24	25
25	26
26	27
27	28
28	29
29	30
30	31
31	33
33	34
34	35
35	20	REFER
35	36
36	37
37	38
38	39
39	41
41	42
42	43
43	44
44	45
45	47
47	48
48	49
49	50
50	51
51	52
52	54
54	55
55	56
56	57
57	58
58	59
59	61
61	62
62	66
66	63
63	64
64	65
65	67
67	69
69	70
70	71
71	72
72	73
73	74
74	75
75	76
76	77
77	78
78	79
79	77	REFER
79	78	REFER
79	80
80	118	REFER
118	19	REFER
80	81
81	82
82	83
83	84
84	82	REFER
84	83	REFER
84	85
85	86
86	88
88	89
89	90
90	91
91	92
92	93
93	19	REFER
93	94
94	95
95	96
96	97
97	98
98	99
99	20	REFER
99	100
100	101
101	102
102	103
103	105
105	106
106	107
107	108
108	109
109	111
111	113
113	114
114	115
115	117