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(16,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(14,28).
next(28,29).
next(29,30).
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(40,41).
next(41,42).
next(29,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(44,48).
next(48,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(53,54).
next(54,55).
next(28,56).
next(56,57).
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(69,70).
doAt(startflow,5).
doAt(a22,7).
doAt(a6,8).
doAt(a16,9).
doAt(a23,10).
doAt(a3,11).
doAt(a12,12).
doAt(a21,13).
doAt(a7,14).
doAt(a8,15).
doAt(a11,16).
doAt(a9,17).
doAt(endflow,18).
doAt(a17,20).
doAt(a13,21).
doAt(a24,22).
doAt(a1,23).
doAt(a10,24).
doAt(a25,25).
doAt(endflow,26).
doAt(a18,28).
doAt(a5,29).
doAt(a15,30).
doAt(a11,31).
doAt(a9,32).
doAt(endflow,33).
doAt(a17,35).
doAt(a13,36).
doAt(a24,37).
doAt(a1,38).
doAt(a10,39).
doAt(a25,40).
doAt(endflow,41).
doAt(a20,43).
doAt(a11,44).
doAt(a9,45).
doAt(endflow,46).
doAt(a17,48).
doAt(a13,49).
doAt(a24,50).
doAt(a1,51).
doAt(a10,52).
doAt(a25,53).
doAt(endflow,54).
doAt(a14,56).
doAt(a4,57).
doAt(a19,58).
doAt(a11,59).
doAt(a9,60).
doAt(endflow,61).
doAt(a17,63).
doAt(a13,64).
doAt(a24,65).
doAt(a1,66).
doAt(a10,67).
doAt(a25,68).
doAt(endflow,69).
subsAt(a22,6).
leftrightnexts(17,20).
leftrightnexts(32,35).
leftrightnexts(45,48).
leftrightnexts(30,43).
leftrightnexts(60,63).
leftrightnexts(29,56).
leftrightnexts(15,28).