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(19,20).
next(20,21).
next(17,22).
next(22,23).
next(23,24).
next(24,25).
next(22,26).
next(26,27).
next(27,28).
next(28,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(30,34).
next(34,35).
next(35,36).
next(36,37).
next(37,38).
next(35,39).
next(39,40).
next(40,41).
next(27,42).
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,7).
doAt(a5,11).
doAt(a4,12).
doAt(a10,14).
doAt(a16,16).
doAt(a2,17).
doAt(a9,18).
doAt(a1,19).
doAt(endflow,20).
doAt(a7,22).
doAt(a12,23).
doAt(endflow,24).
doAt(a8,26).
doAt(a17,27).
doAt(a18,28).
doAt(a3,29).
doAt(a13,30).
doAt(a15,31).
doAt(endflow,32).
doAt(a6,34).
doAt(a25,35).
doAt(a24,36).
doAt(endflow,37).
doAt(a19,39).
doAt(endflow,40).
doAt(a11,42).
doAt(a20,43).
doAt(a14,44).
doAt(a21,45).
doAt(a23,46).
doAt(a3,47).
doAt(a13,48).
doAt(a15,49).
doAt(endflow,50).
doAt(a6,52).
doAt(a25,53).
doAt(a24,54).
doAt(endflow,55).
doAt(a19,57).
doAt(endflow,58).
compAt(a4,x13,8).
compAt(a5,x13,9).
compAt(a10,x12,13).
subsAt(a5,10).
subsAt(a16,15).
leftrightnexts(36,39).
leftrightnexts(31,34).
leftrightnexts(54,57).
leftrightnexts(49,52).
leftrightnexts(28,42).
leftrightnexts(23,26).
leftrightnexts(18,22).