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(5,11).
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(15,21).
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(24,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(34,35).
next(35,36).
next(31,37).
next(37,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(43,44).
next(44,45).
next(39,46).
next(46,47).
next(47,48).
next(48,49).
next(49,50).
next(50,51).
next(51,52).
next(52,53).
doAt(startflow,4).
doAt(a18,5).
doAt(a21,6).
doAt(a16,7).
doAt(a23,8).
doAt(endflow,9).
doAt(a20,12).
doAt(a25,14).
doAt(a2,15).
doAt(a6,16).
doAt(a23,17).
doAt(endflow,19).
doAt(a1,21).
doAt(a5,22).
doAt(a12,23).
doAt(a11,24).
doAt(a7,25).
doAt(a23,26).
doAt(endflow,28).
doAt(a17,30).
doAt(a10,31).
doAt(a13,32).
doAt(a23,33).
doAt(endflow,35).
doAt(a8,37).
doAt(a15,38).
doAt(a9,39).
doAt(a4,40).
doAt(a24,41).
doAt(a23,42).
doAt(endflow,44).
doAt(a22,46).
doAt(a14,48).
doAt(a19,49).
doAt(a24,50).
doAt(a23,51).
doAt(endflow,52).
compAt(a21,x7,11).
compAt(a21,x24,13).
compAt(a21,x15,18).
compAt(a21,x15,27).
compAt(a21,x15,34).
compAt(a21,x15,43).
compAt(a21,x15,47).
leftrightnexts(40,46).
leftrightnexts(32,37).
leftrightnexts(25,30).
leftrightnexts(16,21).
leftrightnexts(6,11).