can someone help me to fix this error

InputFile summerseasonFile

InputFile winterseasonFile

OutputFile mergedFile

num summerseasonId

num summerseasonAge

string summerseasonFirst

string summerseasonLast

string summerseasonClass

num winterseasonId

num winterseasonAge

string winterseasonFirst

string winterseasonLast

string winterseasonClass

string areBothAtEnd= "N"

num END_ID = 999999

getReady()

while areBothAtEnd "Y"

mergeRecords()

endwhile

stop

getReady()

open summerseasonFile "Summerseason.txt"

open winterseasonFile "Winterseason.txt"

open mergedFile "list.txt"

readSummerseason()

readWinterseason()

checkEnd()

return

readSummerseason()

input summeseasonrId, summerseasonFirst, summerseasonLast, summerseasonAge,

summerseasonClass from summerseasonFile

if eof then

summerId = END_ID

endif

return

readWinterseason()

input winterseasonId, winterseasonFirst, winterseasonLast, winterseasonAge,

winterseasonClass from winterseasonFile

if eof then

winterId = END_ID

endif

return

checkEnd()

if summerseasonId = END_ID AND winterseasonId = END_ID then

areBothAtEnd= "Y"

endif

return

mergeRecords()

if summerseasonId

output summerseasonFirst, summerseasonLast to mergedFile

readSummer()

else

output winterseasonFirst, winterseasonLast to mergedFile

readWinter()

endif

checkEnd()

return

finishUp()

close summerseasonFile

close winterseasonFile

close mergedFile

return

12inputFile summerseasonFile 13 inputFile winterseasonFile outputFile mergedFile num summerseasonId num summerseasonAge string summerseasonFirst string summerseasonLast string summerseasonClass num winterseasonId num winterseasonAge string winterseasonFirst string winterseasonLast string winterseasonClass string areBothAtEnd= "N" num END ID 999999 getReady () while areBothAtEnd