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(5,10).
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(14,20).
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(24,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(31,36).
next(36,37).
next(37,38).
next(38,39).
next(20,40).
next(40,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(51,52).
next(49,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(55,59).
next(59,60).
next(60,61).
doAt(startflow,4).
doAt(a4,5).
doAt(a13,7).
doAt(endflow,8).
doAt(a2,10).
doAt(a7,12).
doAt(a10,13).
doAt(a12,14).
doAt(a24,16).
doAt(endflow,18).
doAt(a20,20).
doAt(a17,21).
doAt(a23,23).
doAt(a9,24).
doAt(a3,25).
doAt(endflow,27).
doAt(a22,29).
doAt(a5,30).
doAt(a8,31).
doAt(a21,32).
doAt(endflow,34).
doAt(a25,36).
doAt(endflow,38).
doAt(a19,40).
doAt(a15,41).
doAt(a6,42).
doAt(a11,43).
doAt(a18,44).
doAt(a1,45).
doAt(a14,46).
doAt(a23,48).
doAt(a9,49).
doAt(a3,50).
doAt(endflow,51).
doAt(a22,53).
doAt(a5,54).
doAt(a8,55).
doAt(a21,56).
doAt(endflow,57).
doAt(a25,59).
doAt(endflow,60).
compAt(a13,x11,6).
compAt(a13,x15,11).
compAt(a13,x4,15).
compAt(a13,x11,17).
compAt(a13,x11,22).
compAt(a13,x4,26).
compAt(a13,x4,33).
compAt(a13,x4,37).
compAt(a13,x11,47).
leftrightnexts(32,36).
leftrightnexts(25,29).
leftrightnexts(56,59).
leftrightnexts(50,53).
leftrightnexts(21,40).
leftrightnexts(15,20).
leftrightnexts(6,10).