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(10,14).
next(14,15).
next(15,16).
next(16,17).
next(17,18).
next(15,19).
next(19,20).
next(20,21).
next(7,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(30,31).
next(28,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(33,37).
next(37,38).
next(38,39).
next(25,40).
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(48,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(53,57).
next(57,58).
next(58,59).
doAt(startflow,3).
doAt(a10,4).
doAt(a12,5).
doAt(a24,6).
doAt(a22,7).
doAt(a20,8).
doAt(a17,9).
doAt(a25,10).
doAt(a19,11).
doAt(endflow,12).
doAt(a16,14).
doAt(a1,15).
doAt(a13,16).
doAt(endflow,17).
doAt(a23,19).
doAt(endflow,20).
doAt(a15,22).
doAt(a9,23).
doAt(a8,24).
doAt(a11,25).
doAt(a7,26).
doAt(a17,27).
doAt(a25,28).
doAt(a19,29).
doAt(endflow,30).
doAt(a16,32).
doAt(a1,33).
doAt(a13,34).
doAt(endflow,35).
doAt(a23,37).
doAt(endflow,38).
doAt(a5,40).
doAt(a6,41).
doAt(a2,42).
doAt(a4,43).
doAt(a3,44).
doAt(a14,45).
doAt(a21,46).
doAt(a17,47).
doAt(a25,48).
doAt(a19,49).
doAt(endflow,50).
doAt(a16,52).
doAt(a1,53).
doAt(a13,54).
doAt(endflow,55).
doAt(a23,57).
doAt(endflow,58).
leftrightnexts(16,19).
leftrightnexts(11,14).
leftrightnexts(34,37).
leftrightnexts(29,32).
leftrightnexts(54,57).
leftrightnexts(49,52).
leftrightnexts(26,40).
leftrightnexts(8,22).