73	-20
73	-19
74	-19
73	-18
74	-18
75	-18
73	-17
74	-17
75	-17
76	-17
77	-17
73	-16
74	-16
75	-16
76	-16
77	-16
78	-16
73	-15
74	-15
75	-15
76	-15
77	-15
78	-15
79	-15
80	-15
73	-14
74	-14
75	-14
76	-14
77	-14
78	-14
79	-14
80	-14
73	-13
74	-13
75	-13
76	-13
77	-13
78	-13
79	-13
80	-13
73	-12
74	-12
75	-12
76	-12
77	-12
78	-12
79	-12
80	-12
73	-11
74	-11
75	-11
76	-11
77	-11
78	-11
79	-11
80	-11
73	-10
74	-10
75	-10
76	-10
77	-10
78	-10
79	-10
80	-10
73	-9
74	-9
75	-9
76	-9
77	-9
78	-9
79	-9
80	-9
75	-8
76	-8
77	-8
78	-8
79	-8
80	-8
76	-7
77	-7
78	-7
79	-7
80	-7
78	-6
79	-6
80	-6
79	-5
80	-5
80	-4