# PROGRAM FileWordReplace

Input_file = open("C:\\Users\damia\Downloads\Input_file.txt", "r")
Output_file = open("C:\\Users\damia\Downloads\Output_file.txt", "w")


for line in Input_file:
    Output_file.write(line.replace("ain", "XXX"))

Input_file.close()
Output_file.close()

# END.