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(13,14). next(14,15). next(15,16). next(16,17). next(17,18). next(18,19). next(19,20). next(20,21). next(21,22). next(22,23). next(20,24). next(24,25). next(25,26). next(6,27). 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(40,41). next(41,42). next(42,43). next(43,44). next(44,45). next(45,46). next(46,47). next(44,48). next(48,49). next(49,50). next(30,51). next(51,52). next(52,53). next(53,54). next(54,55). 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(65,66). next(66,67). next(64,68). next(68,69). next(69,70). doAt(startflow,5). doAt(a13,6). doAt(a8,7). doAt(a23,9). doAt(a6,10). doAt(a24,11). doAt(a7,12). doAt(a25,13). doAt(a20,14). doAt(a21,15). doAt(a10,16). doAt(a16,17). doAt(a22,18). doAt(a5,19). doAt(a2,20). doAt(a11,21). doAt(endflow,22). doAt(a15,24). doAt(endflow,25). doAt(a4,27). doAt(a3,28). doAt(a12,29). doAt(a19,30). doAt(a17,31). doAt(a18,32). doAt(a1,33). doAt(a6,34). doAt(a24,35). doAt(a7,36). doAt(a25,37). doAt(a20,38). doAt(a21,39). doAt(a10,40). doAt(a16,41). doAt(a22,42). doAt(a5,43). doAt(a2,44). doAt(a11,45). doAt(endflow,46). doAt(a15,48). doAt(endflow,49). doAt(a14,51). doAt(a18,52). doAt(a1,53). doAt(a6,54). doAt(a24,55). doAt(a7,56). doAt(a25,57). doAt(a20,58). doAt(a21,59). doAt(a10,60). doAt(a16,61). doAt(a22,62). doAt(a5,63). doAt(a2,64). doAt(a11,65). doAt(endflow,66). doAt(a15,68). doAt(endflow,69). subsAt(a23,8). leftrightnexts(21,24). leftrightnexts(45,48). leftrightnexts(65,68). leftrightnexts(31,51). leftrightnexts(7,27).