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(7,16).
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(27,28).
next(19,29).
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(32,40).
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(18,50).
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(50,60).
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).
doAt(startflow,6).
doAt(a22,7).
doAt(a18,8).
doAt(a11,9).
doAt(a1,11).
doAt(a5,12).
doAt(a20,13).
doAt(endflow,14).
doAt(a19,17).
doAt(a14,18).
doAt(a7,19).
doAt(a2,20).
doAt(a1,22).
doAt(a5,23).
doAt(a20,24).
doAt(endflow,27).
doAt(a23,30).
doAt(a15,32).
doAt(a16,34).
doAt(a1,35).
doAt(a5,36).
doAt(a20,37).
doAt(endflow,38).
doAt(a4,40).
doAt(a9,41).
doAt(a13,43).
doAt(a1,45).
doAt(a5,46).
doAt(a20,47).
doAt(endflow,48).
doAt(a17,50).
doAt(a3,51).
doAt(a1,53).
doAt(a5,54).
doAt(a20,55).
doAt(endflow,58).
doAt(a21,60).
doAt(a12,63).
doAt(a24,64).
doAt(a10,65).
doAt(a6,66).
doAt(a25,67).
doAt(a1,68).
doAt(a5,69).
doAt(a20,70).
doAt(endflow,72).
compAt(a1,x2,10).
compAt(a18,x17,16).
compAt(a1,x2,21).
compAt(a18,x11,25).
compAt(a11,x14,26).
compAt(a11,x14,29).
compAt(a18,x11,31).
compAt(a1,x2,33).
compAt(a1,x1,42).
compAt(a1,x2,44).
compAt(a1,x2,52).
compAt(a18,x11,56).
compAt(a11,x14,57).
compAt(a18,x11,61).
compAt(a1,x1,62).
compAt(a11,x14,71).
leftrightnexts(33,40).
leftrightnexts(20,29).
leftrightnexts(51,60).
leftrightnexts(19,50).
leftrightnexts(8,16).