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(19,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(26,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(31,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
next(39,40).
next(37,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(42,46).
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(36,57).
next(57,58).
next(58,59).
next(59,60).
next(60,61).
next(61,62).
next(59,63).
next(63,64).
next(64,65).
next(65,66).
next(66,67).
next(67,68).
next(68,69).
next(30,70).
next(70,71).
next(18,72).
next(72,73).
doAt(startflow,6).
doAt(a10,7).
doAt(a12,10).
doAt(a31,11).
doAt(a44,13).
doAt(a3,14).
doAt(a24,15).
doAt(a1,16).
doAt(a25,17).
doAt(a40,18).
doAt(a42,19).
doAt(a20,20).
doAt(endflow,21).
doAt(a45,23).
doAt(a6,24).
doAt(a14,25).
doAt(a11,26).
doAt(a2,27).
doAt(endflow,28).
doAt(a9,30).
doAt(a28,31).
doAt(a36,32).
doAt(endflow,33).
doAt(a41,35).
doAt(a22,36).
doAt(a33,37).
doAt(a19,38).
doAt(endflow,39).
doAt(a17,41).
doAt(a37,42).
doAt(a13,43).
doAt(endflow,44).
doAt(a15,46).
doAt(a18,47).
doAt(a34,48).
doAt(a26,49).
doAt(a43,50).
doAt(a8,51).
doAt(a16,52).
doAt(a30,53).
doAt(a38,54).
doAt(endflow,55).
doAt(a5,57).
doAt(a7,58).
doAt(a32,59).
doAt(a4,60).
doAt(endflow,61).
doAt(a35,63).
doAt(a27,64).
doAt(a23,65).
doAt(a29,66).
doAt(a39,67).
doAt(endflow,68).
doAt(endflow,70).
doAt(endflow,72).
compAt(a44,x24,8).
compAt(a44,x34,9).
compAt(a44,x42,12).
leftrightnexts(43,46).
leftrightnexts(38,41).
leftrightnexts(60,63).
leftrightnexts(37,57).
leftrightnexts(32,35).
leftrightnexts(31,70).
leftrightnexts(27,30).
leftrightnexts(20,23).
leftrightnexts(19,72).