import re
import sys

inFile = sys.argv[1]
outFile = sys.argv[2]

def swap_case(match):
    return match.group().swapcase()

def analyze_line(line):
    result = re.sub(r'\b\w*([a-ząćęłńóśźż]+[A-ZĄĆĘŁŃÓŚŹŻ]|[A-ZĄĆĘŁŃÓŚŹŻ]+[a-ząćęłńóśźż]+)\w*\b', swap_case, line)
    return result

if __name__ == "__main__":
    try:
        with open(inFile, 'r', encoding='utf-8') as inputFile, open(outFile, 'w', encoding='utf-8') as outputFile:
            for line in inputFile:
                line = line.rstrip()


                modified_line = analyze_line(line)
                outputFile.write(modified_line + '\n')
                print(modified_line)

    except EOFError:
        pass