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(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(24,28).
next(28,29).
next(29,30).
next(23,31).
next(31,32).
next(18,33).
next(33,34).
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(43,47).
next(47,48).
next(48,49).
next(42,50).
next(50,51).
next(36,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
next(58,59).
next(59,60).
next(60,61).
next(61,62).
next(62,63).
next(60,64).
next(64,65).
next(65,66).
next(59,67).
next(67,68).
doAt(startflow,6).
doAt(a15,9).
doAt(a2,11).
doAt(a10,12).
doAt(a20,15).
doAt(a5,16).
doAt(a4,17).
doAt(a12,18).
doAt(a23,19).
doAt(a17,20).
doAt(a1,21).
doAt(a16,22).
doAt(a21,23).
doAt(a22,24).
doAt(a19,25).
doAt(endflow,26).
doAt(a14,28).
doAt(endflow,29).
doAt(endflow,31).
doAt(a7,33).
doAt(a13,34).
doAt(a8,35).
doAt(a3,36).
doAt(a25,37).
doAt(a24,38).
doAt(a17,39).
doAt(a1,40).
doAt(a16,41).
doAt(a21,42).
doAt(a22,43).
doAt(a19,44).
doAt(endflow,45).
doAt(a14,47).
doAt(endflow,48).
doAt(endflow,50).
doAt(a18,52).
doAt(a9,53).
doAt(a11,54).
doAt(a24,55).
doAt(a17,56).
doAt(a1,57).
doAt(a16,58).
doAt(a21,59).
doAt(a22,60).
doAt(a19,61).
doAt(endflow,62).
doAt(a14,64).
doAt(endflow,65).
doAt(endflow,67).
compAt(a2,x7,7).
compAt(a10,x20,8).
compAt(a20,x1,10).
compAt(a20,x8,14).
subsAt(a20,13).
leftrightnexts(25,28).
leftrightnexts(24,31).
leftrightnexts(44,47).
leftrightnexts(43,50).
leftrightnexts(61,64).
leftrightnexts(60,67).
leftrightnexts(37,52).
leftrightnexts(19,33).