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(10,15).
next(15,16).
next(16,17).
next(17,18).
next(8,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(21,26).
next(26,27).
next(27,28).
next(28,29).
next(7,30).
next(30,31).
next(31,32).
next(32,33).
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(42,47).
next(47,48).
next(48,49).
next(49,50).
next(40,51).
next(51,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(52,57).
next(57,58).
next(58,59).
next(59,60).
next(39,61).
next(61,62).
next(62,63).
next(63,64).
next(64,65).
next(65,66).
next(62,67).
next(67,68).
next(68,69).
next(69,70).
doAt(startflow,4).
doAt(a1,6).
doAt(a15,7).
doAt(a6,8).
doAt(a9,9).
doAt(a10,10).
doAt(a14,11).
doAt(a23,12).
doAt(endflow,13).
doAt(a19,15).
doAt(a23,16).
doAt(endflow,17).
doAt(a17,19).
doAt(a8,20).
doAt(a10,21).
doAt(a14,22).
doAt(a23,23).
doAt(endflow,24).
doAt(a19,26).
doAt(a23,27).
doAt(endflow,28).
doAt(a7,30).
doAt(a16,31).
doAt(a18,32).
doAt(a11,33).
doAt(a2,34).
doAt(a22,35).
doAt(a5,36).
doAt(a21,37).
doAt(a12,38).
doAt(a24,39).
doAt(a4,40).
doAt(a3,41).
doAt(a10,42).
doAt(a14,43).
doAt(a23,44).
doAt(endflow,45).
doAt(a19,47).
doAt(a23,48).
doAt(endflow,49).
doAt(a25,51).
doAt(a10,52).
doAt(a14,53).
doAt(a23,54).
doAt(endflow,55).
doAt(a19,57).
doAt(a23,58).
doAt(endflow,59).
doAt(a13,61).
doAt(a10,62).
doAt(a14,63).
doAt(a23,64).
doAt(endflow,65).
doAt(a19,67).
doAt(a23,68).
doAt(endflow,69).
subsAt(a1,5).
leftrightnexts(11,15).
leftrightnexts(22,26).
leftrightnexts(9,19).
leftrightnexts(43,47).
leftrightnexts(53,57).
leftrightnexts(41,51).
leftrightnexts(63,67).
leftrightnexts(40,61).
leftrightnexts(8,30).