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(11,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(18,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(26,33).
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(25,43).
next(43,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
next(10,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
next(53,54).
next(54,55).
next(55,56).
next(56,57).
next(57,58).
doAt(startflow,6).
doAt(a8,8).
doAt(a19,9).
doAt(a9,10).
doAt(a13,11).
doAt(a21,12).
doAt(a14,13).
doAt(a25,14).
doAt(a6,15).
doAt(endflow,16).
doAt(a5,18).
doAt(a22,19).
doAt(a14,20).
doAt(a25,21).
doAt(a6,22).
doAt(endflow,23).
doAt(a11,25).
doAt(a15,26).
doAt(a12,27).
doAt(a14,28).
doAt(a25,29).
doAt(a6,30).
doAt(endflow,31).
doAt(a16,33).
doAt(a17,34).
doAt(a10,35).
doAt(a3,36).
doAt(a23,37).
doAt(a14,38).
doAt(a25,39).
doAt(a6,40).
doAt(endflow,41).
doAt(a7,43).
doAt(a14,44).
doAt(a25,45).
doAt(a6,46).
doAt(endflow,47).
doAt(a18,49).
doAt(a4,50).
doAt(a2,51).
doAt(a24,52).
doAt(a20,53).
doAt(a14,54).
doAt(a25,55).
doAt(a6,56).
doAt(endflow,57).
compAt(a8,x2,7).
leftrightnexts(27,33).
leftrightnexts(26,43).
leftrightnexts(19,25).
leftrightnexts(12,18).
leftrightnexts(11,49).