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(14,18).
next(18,19).
next(19,20).
next(20,21).
next(18,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(25,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(13,35).
next(35,36).
next(36,37).
next(37,38).
next(10,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(45,46).
next(43,47).
next(47,48).
next(48,49).
next(49,50).
next(47,51).
next(51,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(54,58).
next(58,59).
next(59,60).
next(60,61).
next(61,62).
next(62,63).
next(42,64).
next(64,65).
next(65,66).
next(66,67).
doAt(startflow,4).
doAt(a24,7).
doAt(a7,8).
doAt(a11,9).
doAt(a14,10).
doAt(a12,11).
doAt(a22,12).
doAt(a19,13).
doAt(a16,14).
doAt(a3,15).
doAt(endflow,16).
doAt(a20,18).
doAt(a2,19).
doAt(endflow,20).
doAt(a9,22).
doAt(a17,23).
doAt(a1,24).
doAt(a10,25).
doAt(a15,26).
doAt(endflow,27).
doAt(a25,29).
doAt(a21,30).
doAt(a4,31).
doAt(a5,32).
doAt(endflow,33).
doAt(a13,35).
doAt(a18,36).
doAt(endflow,37).
doAt(a6,39).
doAt(a23,40).
doAt(a22,41).
doAt(a19,42).
doAt(a16,43).
doAt(a3,44).
doAt(endflow,45).
doAt(a20,47).
doAt(a2,48).
doAt(endflow,49).
doAt(a9,51).
doAt(a17,52).
doAt(a1,53).
doAt(a10,54).
doAt(a15,55).
doAt(endflow,56).
doAt(a25,58).
doAt(a21,59).
doAt(a4,60).
doAt(a5,61).
doAt(endflow,62).
doAt(a13,64).
doAt(a18,65).
doAt(endflow,66).
compAt(a24,x2,5).
subsAt(a24,6).
leftrightnexts(26,29).
leftrightnexts(19,22).
leftrightnexts(15,18).
leftrightnexts(14,35).
leftrightnexts(55,58).
leftrightnexts(48,51).
leftrightnexts(44,47).
leftrightnexts(43,64).
leftrightnexts(11,39).