Open a txt format file as input. You can create a simple testing file in English by yourself. Read each line in the file and do the following items at same time(case sensitivity). a) change all "we" to "you" b) change all "you" to "we" c) change all "We" to "You" d) change all "You" to "We" e) change all "WE" to "YOU" f) change all "YOU" to "WE" And save the changed lines into a new file.

we\we.c
..\test.txt
..\we
..\makefile
..\test0.txt
we

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