next(1,2). next(2,3). next(3,4). next(4,5). next(5,6). next(6,7). next(7,8). next(8,9). next(9,10). next(10,11). next(11,12). next(12,13). next(9,14). next(14,15). next(15,16). next(16,17). next(6,18). next(18,19). next(19,20). next(20,21). next(21,22). next(22,23). next(23,24). next(24,25). next(25,26). next(26,27). next(27,28). next(28,29). next(29,30). next(30,31). next(31,32). next(32,33). next(33,34). next(34,35). next(35,36). next(36,37). next(37,38). next(38,39). next(39,40). next(36,41). next(41,42). next(42,43). next(43,44). next(34,45). next(45,46). next(46,47). next(47,48). next(48,49). next(49,50). next(46,51). next(51,52). next(52,53). next(53,54). next(31,55). next(55,56). next(56,57). next(57,58). next(58,59). next(59,60). next(60,61). next(61,62). next(62,63). next(63,64). next(64,65). next(61,66). next(66,67). next(67,68). next(68,69). next(59,70). next(70,71). next(71,72). next(72,73). next(73,74). next(74,75). next(71,76). next(76,77). next(77,78). next(78,79). doAt(startflow,5). doAt(a17,6). doAt(a24,7). doAt(a15,8). doAt(a6,9). doAt(a13,10). doAt(a1,11). doAt(endflow,12). doAt(a23,14). doAt(a1,15). doAt(endflow,16). doAt(a7,19). doAt(a5,21). doAt(a11,22). doAt(a12,24). doAt(a22,25). doAt(a14,26). doAt(a18,27). doAt(a16,29). doAt(a9,30). doAt(a21,31). doAt(a20,32). doAt(a19,33). doAt(a3,34). doAt(a8,35). doAt(a6,36). doAt(a13,37). doAt(a1,38). doAt(endflow,39). doAt(a23,41). doAt(a1,42). doAt(endflow,43). doAt(a4,45). doAt(a6,46). doAt(a13,47). doAt(a1,48). doAt(endflow,49). doAt(a23,51). doAt(a1,52). doAt(endflow,53). doAt(a10,55). doAt(a2,56). doAt(a19,58). doAt(a3,59). doAt(a8,60). doAt(a6,61). doAt(a13,62). doAt(a1,63). doAt(endflow,64). doAt(a23,66). doAt(a1,67). doAt(endflow,68). doAt(a4,70). doAt(a6,71). doAt(a13,72). doAt(a1,73). doAt(endflow,74). doAt(a23,76). doAt(a1,77). doAt(endflow,78). compAt(a24,x2,18). compAt(a15,x9,20). compAt(a15,x24,23). compAt(a24,x20,28). compAt(a24,x21,57). leftrightnexts(10,14). leftrightnexts(37,41). leftrightnexts(47,51). leftrightnexts(35,45). leftrightnexts(62,66). leftrightnexts(72,76). leftrightnexts(60,70). leftrightnexts(32,55). leftrightnexts(7,18).