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(17,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(27,31).
next(31,32).
next(32,33).
next(13,34).
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(43,44).
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(52,56).
next(56,57).
next(57,58).
next(50,59).
next(59,60).
next(60,61).
next(61,62).
next(62,63).
next(60,64).
next(64,65).
next(65,66).
doAt(startflow,7).
doAt(a11,11).
doAt(a15,12).
doAt(a3,13).
doAt(a25,14).
doAt(a20,15).
doAt(a10,16).
doAt(a9,17).
doAt(a1,18).
doAt(a12,19).
doAt(a24,20).
doAt(endflow,21).
doAt(a16,23).
doAt(endflow,24).
doAt(a21,26).
doAt(a12,27).
doAt(a24,28).
doAt(endflow,29).
doAt(a16,31).
doAt(endflow,32).
doAt(a7,34).
doAt(a4,36).
doAt(a17,37).
doAt(a14,38).
doAt(a13,41).
doAt(a19,42).
doAt(a8,43).
doAt(a22,44).
doAt(a18,45).
doAt(a2,46).
doAt(a5,47).
doAt(a6,48).
doAt(a10,49).
doAt(a9,50).
doAt(a1,51).
doAt(a12,52).
doAt(a24,53).
doAt(endflow,54).
doAt(a16,56).
doAt(endflow,57).
doAt(a21,59).
doAt(a12,60).
doAt(a24,61).
doAt(endflow,62).
doAt(a16,64).
doAt(endflow,65).
compAt(a20,x23,8).
compAt(a11,x23,9).
compAt(a20,x19,10).
compAt(a20,x17,35).
compAt(a25,x25,39).
compAt(a20,x23,40).
leftrightnexts(20,23).
leftrightnexts(28,31).
leftrightnexts(18,26).
leftrightnexts(53,56).
leftrightnexts(61,64).
leftrightnexts(51,59).
leftrightnexts(14,34).