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(21,22).
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(31,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(36,37).
next(11,38).
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(46,47).
next(47,48).
next(48,49).
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).
next(58,59).
doAt(startflow,7).
doAt(a10,11).
doAt(a6,21).
doAt(a11,25).
doAt(a8,28).
doAt(a15,31).
doAt(a3,32).
doAt(a12,33).
doAt(a14,34).
doAt(a1,35).
doAt(endflow,36).
doAt(a13,42).
doAt(a4,43).
doAt(a5,44).
doAt(a9,45).
doAt(a2,46).
doAt(a11,47).
doAt(a8,50).
doAt(a15,53).
doAt(a3,54).
doAt(a12,55).
doAt(a14,56).
doAt(a1,57).
doAt(endflow,58).
compAt(a15,x2,8).
compAt(a8,x2,9).
compAt(a6,x2,10).
compAt(a15,x1,13).
compAt(a8,x1,14).
compAt(a11,x1,15).
compAt(a6,x1,16).
compAt(a15,x3,17).
compAt(a8,x3,18).
compAt(a11,x3,19).
compAt(a6,x3,20).
compAt(a15,x1,22).
compAt(a8,x1,23).
compAt(a11,x1,24).
compAt(a15,x1,26).
compAt(a8,x1,27).
compAt(a15,x2,29).
compAt(a15,x3,30).
compAt(a15,x1,38).
compAt(a8,x1,39).
compAt(a11,x1,40).
compAt(a6,x1,41).
compAt(a15,x1,48).
compAt(a8,x1,49).
compAt(a15,x2,51).
compAt(a15,x3,52).
subsAt(a6,12).
leftrightnexts(12,38).