infile = open('input.txt', 'r')
outfile = open('output.txt', 'w')
for line in infile:
    outfile.write(line.swapcase())
infile.close()
outfile.close()

2d8517b429a96f124d09225884bfade97695aa74
<mask token>

<mask token>
for line in infile:
    outfile.write(line.swapcase())
infile.close()
outfile.close()

infile = open('input.txt', 'r')
outfile = open('output.txt', 'w')
for line in infile:
    outfile.write(line.swapcase())
infile.close()
outfile.close()
