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(12,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(10,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(25,31).
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(23,40).
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(44,50).
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,4).
doAt(a23,5).
doAt(a20,7).
doAt(a12,8).
doAt(a19,9).
doAt(a9,10).
doAt(a18,11).
doAt(a11,12).
doAt(a6,13).
doAt(a17,14).
doAt(a1,15).
doAt(endflow,16).
doAt(a15,18).
doAt(a17,19).
doAt(a1,20).
doAt(endflow,21).
doAt(a3,23).
doAt(a16,24).
doAt(a10,25).
doAt(a22,26).
doAt(a17,27).
doAt(a1,28).
doAt(endflow,29).
doAt(a24,31).
doAt(a5,32).
doAt(a25,33).
doAt(a21,34).
doAt(a13,35).
doAt(a17,36).
doAt(a1,37).
doAt(endflow,38).
doAt(a4,40).
doAt(a14,41).
doAt(a8,42).
doAt(a2,43).
doAt(a10,44).
doAt(a22,45).
doAt(a17,46).
doAt(a1,47).
doAt(endflow,48).
doAt(a24,50).
doAt(a5,51).
doAt(a25,52).
doAt(a21,53).
doAt(a13,54).
doAt(a17,55).
doAt(a1,56).
doAt(endflow,57).
compAt(a20,x23,6).
leftrightnexts(13,18).
leftrightnexts(26,31).
leftrightnexts(45,50).
leftrightnexts(24,40).
leftrightnexts(11,23).