touch inFile1
touch inFile2
touch inFile3
touch inFile4

runhaskell demo.hs; sleep 1
stat(inFile1) 
stat(inFile2) 
stat(inFile3) 
Some output
stat(outFile1)
write(outFile1)
read(inFile1)
read(inFile2)
stat(inFile4) 
stat(outFile2)
write(outFile2)
read(inFile3)
read(inFile4)
stat(outFile3)
write(outFile3)

runhaskell demo.hs; sleep 1
stat(inFile1) 
stat(inFile2) 
stat(inFile3) 
Some output
stat(outFile1)
stat(inFile4) 
stat(outFile2)
stat(outFile3)
write(outFile3)
read(inFile1)

echo "2" > inFile2

runhaskell demo.hs; sleep 1
stat(inFile1) 
stat(inFile2) 
stat(inFile3) 
Some output
stat(outFile1)
write(outFile1)
read(inFile1)
read(inFile2)
stat(inFile4) 
stat(outFile2)
write(outFile2)
read(inFile3)
read(inFile4)
stat(outFile3)
write(outFile3)

rm outFile1

runhaskell demo.hs; sleep 1
stat(inFile1) 
stat(inFile2) 
stat(inFile3) 
Some output
stat(outFile1)
write(outFile1)
read(inFile1)
read(inFile2)
stat(inFile4) 
stat(outFile2)
stat(outFile3)
write(outFile3)

echo "3" > inFile3

runhaskell demo.hs; sleep 1
stat(inFile1) 
stat(inFile2) 
stat(inFile3) 
Some output
stat(outFile1)
write(outFile1)
read(inFile1)
read(inFile2)
stat(inFile4) 
stat(outFile2)
write(outFile2)
read(inFile3)
read(inFile4)
stat(outFile3)
write(outFile3)

echo "4" > inFile4

touch inFile4
runhaskell demo.hs; sleep 1
stat(inFile1) 
stat(inFile2) 
stat(inFile3) 
Some output
stat(outFile1)
stat(inFile4) 
stat(outFile2)
write(outFile2)
read(inFile1)
read(inFile3)
read(inFile4)
stat(outFile3)
write(outFile3)