Input
(+1 -2 -3 +4 -5 -6 -7 -8 +9 -10 -11 -12 +13 +14 +15 -16 -17 +18 +19 +20 +21)(-22 -23 -24 -25 -26 -27 -28 +29 +30 +31 -32 -33 +34 +35 -36 +37 +38 +39 -40 +41 +42 +43 +44)(+45 +46 +47 +48 -49 +50 -51 +52 -53 +54 +55 -56 +57 -58 +59 -60 -61 -62 -63 -64 +65 -66)(-67 +68 +69 +70 -71 -72 +73 +74 -75 +76 -77 -78 +79 +80 +81 +82 -83 +84 +85 +86 -87 -88 -89 +90)(-91 -92 +93 +94 -95 -96 +97 +98 -99 -100 -101 -102 +103 +104 -105 +106 -107 -108 +109 +110 +111 -112 +113 +114 -115 +116 +117 -118 +119)(-120 +121 +122 -123 -124 -125 +126 +127 +128 +129 -130 +131 -132 +133 -134 -135 -136 -137 +138 -139 +140 +141 +142 +143 -144 -145 +146 -147 +148)(-149 -150 +151 -152 -153 -154 -155 -156 +157 +158 +159 +160 -161 +162 +163 +164 +165 -166 +167 -168 -169 +170 -171 +172)
Output
(2, 4), (3, 6), (5, 7), (8, 10), (9, 12), (11, 14), (13, 16), (15, 17), (18, 20), (19, 22), (21, 24), (23, 25), (26, 27), (28, 29), (30, 32), (31, 34), (33, 35), (36, 37), (38, 39), (40, 41), (42, 1), (43, 46), (45, 48), (47, 50), (49, 52), (51, 54), (53, 56), (55, 57), (58, 59), (60, 61), (62, 64), (63, 66), (65, 67), (68, 69), (70, 72), (71, 73), (74, 75), (76, 77), (78, 80), (79, 81), (82, 83), (84, 85), (86, 87), (88, 44), (90, 91), (92, 93), (94, 95), (96, 98), (97, 99), (100, 102), (101, 103), (104, 106), (105, 107), (108, 109), (110, 112), (111, 113), (114, 116), (115, 117), (118, 120), (119, 122), (121, 124), (123, 126), (125, 128), (127, 129), (130, 132), (131, 89), (133, 135), (136, 137), (138, 139), (140, 142), (141, 144), (143, 145), (146, 147), (148, 150), (149, 151), (152, 154), (153, 156), (155, 157), (158, 159), (160, 161), (162, 163), (164, 166), (165, 167), (168, 169), (170, 171), (172, 174), (173, 176), (175, 178), (177, 179), (180, 134), (181, 184), (183, 185), (186, 187), (188, 190), (189, 192), (191, 193), (194, 195), (196, 198), (197, 200), (199, 202), (201, 204), (203, 205), (206, 207), (208, 210), (209, 211), (212, 214), (213, 216), (215, 217), (218, 219), (220, 221), (222, 224), (223, 225), (226, 227), (228, 230), (229, 231), (232, 233), (234, 236), (235, 237), (238, 182), (239, 241), (242, 243), (244, 246), (245, 248), (247, 250), (249, 251), (252, 253), (254, 255), (256, 257), (258, 260), (259, 261), (262, 264), (263, 265), (266, 268), (267, 270), (269, 272), (271, 274), (273, 275), (276, 278), (277, 279), (280, 281), (282, 283), (284, 285), (286, 288), (287, 290), (289, 291), (292, 294), (293, 295), (296, 240), (297, 300), (299, 301), (302, 304), (303, 306), (305, 308), (307, 310), (309, 312), (311, 313), (314, 315), (316, 317), (318, 319), (320, 322), (321, 323), (324, 325), (326, 327), (328, 329), (330, 332), (331, 333), (334, 336), (335, 338), (337, 339), (340, 342), (341, 343), (344, 298)