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(23,24).
next(24,25).
next(25,26).
next(26,27).
next(16,28).
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(31,44).
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(52,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(58,59).
next(30,60).
next(60,61).
next(61,62).
next(62,63).
next(63,64).
next(64,65).
next(65,66).
next(66,67).
next(67,68).
next(68,69).
next(69,70).
next(70,71).
next(71,72).
next(72,73).
next(73,74).
next(74,75).
next(75,76).
next(76,77).
doAt(startflow,9).
doAt(a6,12).
doAt(a3,14).
doAt(a20,15).
doAt(a17,16).
doAt(a15,17).
doAt(a16,20).
doAt(a21,22).
doAt(a4,23).
doAt(a24,24).
doAt(a23,25).
doAt(endflow,26).
doAt(a2,29).
doAt(a25,30).
doAt(a10,31).
doAt(a8,32).
doAt(a16,35).
doAt(a21,36).
doAt(a4,37).
doAt(a24,38).
doAt(a23,39).
doAt(endflow,42).
doAt(a1,46).
doAt(a19,47).
doAt(a18,50).
doAt(a16,52).
doAt(a21,53).
doAt(a4,54).
doAt(a24,55).
doAt(a23,56).
doAt(endflow,58).
doAt(a11,60).
doAt(a12,61).
doAt(a14,62).
doAt(a7,63).
doAt(a9,64).
doAt(a13,66).
doAt(a5,67).
doAt(a16,70).
doAt(a21,71).
doAt(a4,72).
doAt(a24,73).
doAt(a23,74).
doAt(endflow,76).
compAt(a21,x2,10).
compAt(a20,x2,11).
compAt(a21,x2,19).
compAt(a21,x28,21).
compAt(a21,x24,28).
compAt(a21,x2,34).
compAt(a15,x11,40).
compAt(a15,x19,41).
compAt(a15,x11,44).
compAt(a21,x2,45).
compAt(a21,x35,48).
compAt(a15,x35,49).
compAt(a15,x19,57).
compAt(a16,x18,65).
compAt(a21,x2,69).
compAt(a15,x11,75).
subsAt(a3,13).
subsAt(a16,18).
subsAt(a16,33).
subsAt(a16,51).
subsAt(a16,68).
leftrightnexts(32,44).
leftrightnexts(31,60).
leftrightnexts(17,28).