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(10,15). next(15,16). next(16,17). next(17,18). next(18,19). next(19,20). next(20,21). next(17,22). next(22,23). next(23,24). next(24,25). next(25,26). next(26,27). next(27,28). next(28,29). next(25,30). next(30,31). next(31,32). next(32,33). next(16,34). 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(44,45). doAt(startflow,3). doAt(a9,5). doAt(a3,6). doAt(a8,7). doAt(a7,8). doAt(a1,9). doAt(a14,10). doAt(a24,11). doAt(a2,12). doAt(endflow,13). doAt(a6,15). doAt(a20,16). doAt(a17,17). doAt(a4,18). doAt(a2,19). doAt(endflow,20). doAt(a5,22). doAt(a11,23). doAt(a19,24). doAt(a15,25). doAt(a25,26). doAt(a2,27). doAt(endflow,28). doAt(a22,30). doAt(a2,31). doAt(endflow,32). doAt(a21,34). doAt(a23,35). doAt(a16,36). doAt(a12,37). doAt(a2,38). doAt(endflow,39). doAt(a18,41). doAt(a10,42). doAt(a2,43). doAt(endflow,44). subsAt(a9,4). leftrightnexts(26,30). leftrightnexts(18,22). leftrightnexts(37,41). leftrightnexts(17,34). leftrightnexts(11,15).