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(15,19).
next(19,20).
next(20,21).
next(21,22).
next(19,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(14,28).
next(28,29).
next(29,30).
next(30,31).
next(4,32).
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(50,51).
next(48,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(43,57).
next(57,58).
next(58,59).
next(59,60).
doAt(startflow,3).
doAt(a22,4).
doAt(a6,5).
doAt(a21,6).
doAt(a17,7).
doAt(a8,8).
doAt(a25,9).
doAt(a13,10).
doAt(a10,11).
doAt(a1,12).
doAt(a7,13).
doAt(a18,14).
doAt(a12,15).
doAt(a24,16).
doAt(endflow,17).
doAt(a16,19).
doAt(a11,20).
doAt(endflow,21).
doAt(a19,23).
doAt(a4,24).
doAt(a9,25).
doAt(endflow,26).
doAt(a23,28).
doAt(a14,29).
doAt(endflow,30).
doAt(a20,32).
doAt(a2,33).
doAt(a5,34).
doAt(a3,35).
doAt(a17,36).
doAt(a8,37).
doAt(a25,38).
doAt(a13,39).
doAt(a10,40).
doAt(a1,41).
doAt(a7,42).
doAt(a18,43).
doAt(a12,44).
doAt(a24,45).
doAt(endflow,46).
doAt(a16,48).
doAt(a11,49).
doAt(endflow,50).
doAt(a19,52).
doAt(a4,53).
doAt(a9,54).
doAt(endflow,55).
doAt(a23,57).
doAt(a14,58).
doAt(endflow,59).
leftrightnexts(20,23).
leftrightnexts(16,19).
leftrightnexts(15,28).
leftrightnexts(49,52).
leftrightnexts(45,48).
leftrightnexts(44,57).
leftrightnexts(5,32).