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(18,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(25,30).
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(30,40).
next(40,41).
next(41,42).
next(42,43).
next(43,44).
next(23,45).
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(51,56).
next(56,57).
next(57,58).
next(58,59).
next(59,60).
next(60,61).
next(57,62).
next(62,63).
next(63,64).
next(64,65).
next(56,66).
next(66,67).
next(67,68).
next(68,69).
next(69,70).
doAt(startflow,7).
doAt(a2,10).
doAt(a13,12).
doAt(a16,15).
doAt(a10,16).
doAt(a7,17).
doAt(a15,18).
doAt(a1,19).
doAt(a5,20).
doAt(endflow,21).
doAt(a19,23).
doAt(a25,24).
doAt(a20,25).
doAt(a8,26).
doAt(a5,27).
doAt(endflow,28).
doAt(a18,30).
doAt(a6,31).
doAt(a11,32).
doAt(a5,33).
doAt(endflow,34).
doAt(a12,36).
doAt(a5,37).
doAt(endflow,38).
doAt(a3,40).
doAt(a22,41).
doAt(a5,42).
doAt(endflow,43).
doAt(a23,45).
doAt(a24,46).
doAt(a9,47).
doAt(a4,48).
doAt(a17,49).
doAt(a14,50).
doAt(a20,51).
doAt(a8,52).
doAt(a5,53).
doAt(endflow,54).
doAt(a18,56).
doAt(a6,57).
doAt(a11,58).
doAt(a5,59).
doAt(endflow,60).
doAt(a12,62).
doAt(a5,63).
doAt(endflow,64).
doAt(a3,66).
doAt(a22,67).
doAt(a5,68).
doAt(endflow,69).
compAt(a16,x1,8).
compAt(a10,x4,9).
compAt(a13,x3,11).
compAt(a16,x19,14).
subsAt(a16,13).
leftrightnexts(32,36).
leftrightnexts(31,40).
leftrightnexts(26,30).
leftrightnexts(58,62).
leftrightnexts(57,66).
leftrightnexts(52,56).
leftrightnexts(24,45).
leftrightnexts(19,23).